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Published vulnerabilities with severity, known exploitation and official sources.
CVE-2026-18799
Medium · 4.3
CWE-862 Oct 16, 2026
Mattermost Server fails to restrict Slack import account binding, allowing team admins to forge posts as existing users
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team and forge posts attributed to those users' identities via a crafted Slack export containing target users' email addresses.. Mattermost Advisory ID: MMSA-2026-00757
CVE-2026-18560
Medium · 4.3
CWE-203 Oct 16, 2026
Improper order of authorisations in Mattermost GetFile API leads to an authenticated user to determine a post’s quarantined status
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to validate user’s permissions before other validations which allows non-content reviewers to infer a post’s flagged status via direct API call.. Mattermost Advisory ID: MMSA-2026-00754
CVE-2026-18256
Medium · 4.3
CWE-863 Oct 16, 2026
Private team metadata disclosure via the team search API
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to properly restrict private teams from public team search results, which allows an authenticated user without permission to list private teams to disclose the ID, name, and display name of private teams via a modified team search request. Mattermost Advisory ID: MMSA-2026-00748
CVE-2026-18223
Medium · 5.0
CWE-863 Oct 16, 2026
Mattermost invitation tokens not bound to invited email address allowing unauthorized team and private channel access
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to validate the invited recipient's email address when redeeming team and guest invitation tokens, which allows an authenticated attacker to join a team or gain unauthorized access to private channels via a forwarded or leaked invitation link.. Mattermost Advisory ID: MMSA-2026-00747
CVE-2026-16453
High · 7.1
CWE-472 Oct 16, 2026
Mattermost SAML RelayState forgery allows unauthorized team membership
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to verify the integrity of the SAML RelayState POST parameter which allows an authenticated SAML user to join any team, including invite-only teams, via forging the team_id or invite_id fields in the RelayState.. Mattermost Advisory ID: MMSA-2026-00727
CVE-2026-16251
Medium · 6.5
CWE-770 Oct 16, 2026
Mattermost local image proxy allows server memory exhaustion via unbounded image response buffering
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to limit the size of remote image responses buffered in memory during local image proxy direct fetches, which allows a remote attacker to cause memory exhaustion on the server via a crafted oversized image response.. Mattermost Advisory ID: MMSA-2026-00726
CVE-2026-100108
Medium · 6.4
CWE-79 Oct 16, 2026
Social Share Buttons <= 1.30 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'share_url' Network Setting
The Social Share Buttons plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'form (containing share_url)' parameter in all versions up to, and including, 1.30 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that the 7-day review-nag timer has elapsed since the attacker's first wp-admin visit, as the nonce needed to reach the save-network handler is only rendered in the DOM once that timer has passed.
CVE-2026-100106
Medium · 6.4
CWE-79 Oct 16, 2026
FiboSearch <= 1.34.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'purchased_plan' Parameter
The FiboSearch – Ajax Search for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'purchased_plan' parameter in all versions up to, and including, 1.34.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that the site owner has previously completed the standard Freemius opt-in flow; once that condition is met, any Subscriber can reach the vulnerable handler simply by loading /wp-admin/profile.php with the requisite query parameters.
CVE-2026-97640
High · 7.2
CWE-79 Oct 16, 2026
WPConsent <= 1.1.9 - Unauthenticated Stored Cross-Site Scripting via Comment Content via Simple HTML DOM Parser Noise-Key Restoration (mXSS)
The WPConsent – Cookie Banner & Cookie Consent for Privacy Compliance (GDPR / CCPA / EU Compliance Cookie Notice) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Simple HTML DOM Parser Noise-Key Restoration (mXSS) in all versions up to, and including, 1.1.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the Script Blocking feature to be enabled, and the exploit chain depends on an attacker submitting two coordinated comments — one embedding event-handler syntax inside an allowed <code> element and one placing the deterministic ___noise___ restoration key inside an allowed <abbr title=""> attribute — with the key offset confirmable via an unauthenticated wpconsent_debug=1 request.
CVE-2026-97296
High · 8.1
CWE-502 Oct 16, 2026
WordPress Gravity Forms plugin < 3.1.1 - PHP Object Injection vulnerability
Deserialization of Untrusted Data vulnerability in Rocketgenius, Inc Gravity Forms gravityforms allows Object Injection.This issue affects Gravity Forms: from n/a before 3.1.1.
CVE-2026-96339
High · 7.1
CWE-79 Oct 16, 2026
WordPress Houzez theme <= 4.4.0 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Houzez.co Houzez houzez allows Reflected XSS.This issue affects Houzez: from n/a through 4.4.0.
CVE-2026-94388
Critical · 9.3
CWE-89 Oct 16, 2026
WordPress Green Popups plugin < 7.6.3 - SQL Injection vulnerability
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in halfdata Green Popups halfdata-green-popups allows Blind SQL Injection.This issue affects Green Popups: from n/a before 7.6.3.
CVE-2026-94169
Critical · 10.0
CWE-94 Oct 16, 2026
WordPress The Grid plugin <= 2.8.1 - Remote Code Execution (RCE) vulnerability
Improper Control of Generation of Code ('Code Injection') vulnerability in Theme-one The Grid the-grid allows Command Injection.This issue affects The Grid: from n/a through 2.8.1.
CVE-2026-92553
High · 8.8
CWE-434 Oct 16, 2026
YaySMTP <= 2.7.7 - Authenticated (Subscriber+) Arbitrary File Upload via Attachment Filename Extension
The YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.7.7 via the putFile function. This is due to insufficient file type validation in the putFile function, as sanitize_file_name() does not strip executable extensions and no allow-list, MIME check, or safe-extension rename is applied. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. The only server-side guard is a .htaccess file containing 'Require all denied' written by writeGuards(), which is silently ignored by nginx and by Apache configured with AllowOverride None, meaning RCE is fully achievable on those server configurations.
CVE-2026-92427
Medium · 5.3
CWE-200 Oct 16, 2026
Coinsnap Bitcoin Crowdfunding <= 1.2.0 - Unauthenticated Payment Record Forgery via Webhook Secret Disclosure
The Coinsnap Bitcoin Crowdfunding WordPress plugin through 1.2.0 does not restrict access to the secret used to authenticate its payment gateway webhook, disclosing it to unauthenticated users and rendering the webhook's signature check ineffective. This allows unauthenticated attackers to forge payment-confirmation notifications and record arbitrary donations as completed, with attacker-chosen amounts, donor names and messages.
CVE-2026-91833
Medium · 6.8
CWE-89 Oct 16, 2026
WX Subscribe <= 1.2.1 - Unauthenticated SQLi via 'attach' Parameter
The WX Subscribe 微信支付付费订阅 WordPress plugin through 1.2.1 does not sanitise and escape a parameter before using it in a SQL statement, allowing unauthenticated attackers to perform SQL injection attacks on installs where the payment key has not been configured.
CVE-2026-92115
High · 8.8
CWE-77 Oct 16, 2026
WP Photo Album Plus <= 9.3.02.002 - Authenticated (Custom+) Command Injection via 'value' Parameter (crop item) in update-photo AJAX Action
The WP Photo Album Plus plugin for WordPress is vulnerable to authenticated Command Injection in all versions up to, and including, 9.3.02.002 via the `value` parameter of the `update-photo` AJAX action. This is due to insufficient shell escaping within the `wppa_image_magick_a()` function, where the attacker-controlled `value` parameter is concatenated raw — without `escapeshellarg()` — into an ImageMagick command string before being passed to `exec()`; further, `wppa_decode()` actively restores percent-encoded shell metacharacters (e.g., `%26`→`&`, `%23`→`#`) rather than stripping them, allowing crafted payloads to survive sanitization and break out of the ImageMagick argument context. This makes it possible for authenticated attackers holding the plugin-defined `wppa_upload` capability to execute arbitrary operating-system commands as the web-server user, achieving full remote code execution on the underlying server. Exploitation requires ImageMagick to be enabled on the server; the `wppa_upload` capability is a plugin-level privilege that site administrators may grant to lower-privileged WordPress roles via the plugin's Users settings, broadening the pool of potential attackers beyond administrators.
CVE-2026-91830
Medium · 6.5
CWE-200 Oct 16, 2026
Subscribe to Comments < 2.3.3 - Unauthenticated Subscription Management Key Disclosure via Forged Comment Cookie
The Subscribe to Comments WordPress plugin before 2.3.3 does not sign or validate a cookie it trusts to identify a commenter, allowing unauthenticated attackers to disclose a subscriber's management key and silently alter that subscriber's subscriptions.
CVE-2026-74923
Medium · 5.3
CWE-200 Oct 16, 2026
Document Gallery <= 5.1.1 - Unauthenticated Non-Public Attachment Disclosure via dg_generate_gallery and dg_generate_icons
The Document Gallery WordPress plugin through 5.1.1 does not perform any capability or ownership check when generating a gallery on demand, allowing unauthenticated users to enumerate and disclose the titles, descriptions and direct file URLs of media attached to unpublished, private or trashed content.
CVE-2026-19867
Medium · 4.3
CWE-770 Oct 16, 2026
Uncapped mention keys in user notification properties allow CPU exhaustion during post processing
Mattermost versions 11.10.x <= 11.10.0, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10 fail to cap the number and size of mention keys stored in a user's notification properties, and to bound the quadratic multibyte-keyword matching performed for each post, which allows an authenticated user to degrade post-processing latency and consume excessive CPU on behalf of other members of any channel they share via storing an oversized notify_props.mention_keys list on their own profile.. Mattermost Advisory ID: MMSA-2026-00773
CVE-2026-19798
Medium · 4.3
CWE-862 Oct 16, 2026
WP Map Block <= 3.0.0 - Missing Authorization to Authenticated (Contributor+) Arbitrary Map Publish/Unpublish/Delete via set_status() and bulk() REST Endpoints
The Wp Map Block plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the set_status() and bulk() functions in the Maps_Controller REST controller in versions up to, and including, 3.0.0. The plugin's permission_callback (can_edit()) only verifies current_user_can('edit_posts') and performs no object-level ownership check or verification of publish-level capabilities, while the handlers pass the caller-controlled map ID directly to wp_update_post() (and wp_delete_post() in the bulk delete branch) to change post_status between publish and draft. This makes it possible for authenticated attackers, with Contributor-level access and above, to publish or unpublish (and bulk-delete) any wpmb_map post, including maps owned by administrators, which hides published maps from all public pages site-wide or forces draft maps to become publicly visible.
CVE-2026-19603
Medium · 4.3
CWE-201 Oct 16, 2026
Private channel ID disclosure via user status endpoints
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to sanitize the active channel field returned by the user status API endpoints, which allows an authenticated user to learn the channel ID of a private channel another user is actively viewing via the status endpoints, without being a member of that channel. Mattermost Advisory ID: MMSA-2026-00765
CVE-2026-19601
Medium · 4.9
CWE-201 Oct 16, 2026
Disclosure of AD/LDAP bind password via Test Connection
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to invalidate the stored AD/LDAP bind password when other connection settings (such as the server address) are changed, which allows a System Console administrator to disclose the plaintext bind password to an attacker-controlled server via the Test Connection / diagnostics feature. Mattermost Advisory ID: MMSA-2026-00764
CVE-2026-19541
Medium · 6.5
CWE-201 Oct 16, 2026
Outgoing OAuth connection client secret exposure during connection validation
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to require re-entry of the stored client secret when validating an outgoing OAuth connection, which allows an authenticated user with permission to manage outgoing OAuth connections to obtain the secret via pointing the token URL at an attacker-controlled endpoint and triggering validation.. Mattermost Advisory ID: MMSA-2026-00761
CVE-2026-18795
Medium · 6.4
CWE-862 Oct 16, 2026
Missing server side validation allowed user to quarantine a DM and GM post
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to enforce DM/GM check on server side which allows an authenticated user to quarantine a post belonging to DM or GM via direct API call.. Mattermost Advisory ID: MMSA-2026-00756