CVE-2026-107638 — pH7Builder before 18.5.0 2FA Brute Force via VerificationCodeFormProcess.php
pH7Builder (pH7 Social Dating CMS) before 18.5.0 contains an improper restriction of authentication attempts vulnerability that allows attackers to bypass two-factor authentication by guessing TOTP codes without limits. Attackers who know an account password can submit unlimited 6-digit verification codes to VerificationCodeFormProcess.php to take over member, affiliate, or administrator accounts.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.4% (30-day exploitation probability)+4
- Technical severity (medium)+3
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.
CISA SSVC assessment CISA
Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.
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.
- Identify exposed assets running the affected vendor/product/version combinations (Ph7software Ph7builder).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- Search available logs for exploit probes matching the vulnerability class (authentication), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Ph7software | Ph7builder | < 18.5.0 | Vulnerable | CVE Program (cve.org) e CISA ADP |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 7.6 | CVSS 4.0 | High | — | — | disclosure@vulncheck.com via NIST National Vulnerability Database |
| 7.6 | CVSS 4.0 | High | — | — | VulnCheck via CVE Program (cve.org) e CISA ADP |
| 6.8 | CVSS 3.1 | Medium | 1.6 | 5.2 | disclosure@vulncheck.com via NIST National Vulnerability Database |
| 6.8 | CVSS 3.1 | Medium | — | — | VulnCheck via CVE Program (cve.org) e CISA ADP |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N (score shown at the top: disclosure@vulncheck.com) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
CWE-307 · Improper Restriction of Excessive Authentication Attempts
EPSS over time FIRST
Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.37%
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).
- Review authentication logs: logins without MFA, anomalous sessions and recently created accounts.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · ph7software/ph7builder
- SSVC assessment updated
- Record published
- CVSS changed · 6.8
- Source status changed · → Deferred
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 13, 2026 – Oct 13, 2026
References
4 on the record
Elsewhere on this site
Related CVEs (same products)
- Medium CVE-2026-108904 pH7Builder before 18.5.0 Sensitive Data Exposure via Member API UserController 4d
- High CVE-2026-108905 pH7Builder (pH7 Social Dating CMS) before 18.6.0 contains a hard-coded API key vulnerability in... 4d
- Medium CVE-2026-108903 pH7Builder before 19.3.0 CAPTCHA Bypass via Client-Chosen Form ID 4d
- High CVE-2026-108902 pH7Builder before 18.5.0 Path Traversal Arbitrary File Deletion via picture_link 4d
- Medium CVE-2026-107636 pH7Builder before 18.5.1 Payment Bypass via Payment Module MainController 7d
- Medium CVE-2026-107637 pH7Builder before 18.5.0 Improper Authorization via Note Module delete() Action 7d
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 fixed version, patch or mitigation documented.
- 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-2026-107638 is "pH7Builder before 18.5.0 2FA Brute Force via VerificationCodeFormProcess.php", rated Medium. It affects Ph7builder (Ph7software); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.8 describes technical severity. EPSS 0.37% estimates the probability of exploitation in 30 days; neither replaces your asset context. 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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