CVE Intelligence
High Cross-site scripting

CVE-2026-109998 — Mang Board <= 2.4.3 - Unauthenticated Stored Cross-Site Scripting via 'content' Parameter via content_reply AJAX

The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter in all versions up to, and including, 2.4.3 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 is exploitable because the wp_ajax_nopriv_mb_template endpoint is publicly accessible without authentication, nonce verification is not enforced for the content_reply mode, and admin-ajax.php responds with Content-Type: text/html, causing browsers to execute injected tags embedded in the JSON response body.

Published Oct 16, 2026 · Updated Oct 16, 2026 · Sources: CVE Program (cve.org) e CISA ADP, NIST National Vulnerability Database · CNA: Wordfence

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
—
No EPSS score.
Affects
Kitae-park
Mang Board
CVSS base
7.2
High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Kitae-park Mang Board).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  4. Search available logs for exploit probes matching the vulnerability class (cross-site scripting), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Kitae-park Mang Board ≤ 2.4.3 Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.2 CVSS 3.1 High 3.9 2.7 security@wordfence.com via NIST National Vulnerability Database
7.2 CVSS 3.1 High — — Wordfence via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N (score shown at the top: security@wordfence.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-79 · Cross-site Scripting (XSS)

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Monitor CSP violation reports and script payloads in reflected parameters.
web/proxy/WAF logsnetwork IDS/IPSapplication logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Source status changed · Published → Received
    Oct 16, 2026 · NIST National Vulnerability Database
  • Record published
    Oct 16, 2026
  • CVSS changed · 7.2
    Oct 16, 2026 · CVE Program (cve.org) e CISA ADP
  • Source status changed · → Published
    Oct 16, 2026 · CVE Program (cve.org) e CISA ADP
  • Record created in this database
    Oct 16, 2026 · CVE Program (cve.org) e CISA ADP
  • CVE published
    Oct 16, 2026 · Wordfence

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 16, 2026 – Oct 16, 2026

References

6 on the record

Elsewhere on this site

Kitae-park
every CVE for this vendor
Cross-site scripting
same class
CWE-79
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-109219 Mang Board <= 2.4.4 - Unauthenticated Arbitrary File Upload via 'image_path' Parameter 9h
  • CVE-2026-109512 Mang Board <= 2.4.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'content' Parameter 9h
  • CVE-2026-88043 Mang Board WP <= 2.4.0 - Unauthenticated Stored Cross-Site Scripting via 'data_type' Parameter 1d
  • CVE-2026-107751 Mang Board <= 2.4.3 - Unauthenticated Stored Cross-Site Scripting via 'user_name' Parameter 2d
  • CVE-2026-104761 Mang Board <= 2.4.3 - Authenticated (Custom+) Stored Cross-Site Scripting via 'content' Parameter 2d
  • CVE-2026-104909 Mang Board <= 2.4.3 - Unauthenticated Local File Inclusion via '<mode>_type' Parameter 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No FIRST EPSS score.
  • No fixed version, patch or mitigation documented.
  • No CISA SSVC assessment.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-109998 is "Mang Board <= 2.4.3 - Unauthenticated Stored Cross-Site Scripting via 'content' Parameter via content_reply AJAX", rated High. It affects Mang Board (Kitae-park); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.2 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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