phpList < 3.7.0-RC5 Cross-Site Request Forgery via Bounce Rules (CVE-2026-73481) | HOL Guard CVE

Medium · CVSS 5.4CVE-2026-73481

phpList < 3.7.0-RC5 Cross-Site Request Forgery via Bounce Rules

Answer in brief

CVE-2026-73481 records a Medium severity (CVSS 5.4) vulnerability in phpList < 3.7.0-RC5 Cross-Site Request Forgery via Bounce Rules. The current sources do not mark it as known exploited. The current feed maps phplist/phplist3 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 13, 2026Updated Aug 14, 2026Source checked Sep 27, 2026First seen by HOL Aug 13, 2026Material review Aug 14, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps phplist/phplist3 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
phplist/phplist3generic	>=0 <3.7.0-RC5	3.7.0-RC5

Recommended response

Check inventory. Check lockfiles and deployed manifests for phplist/phplist3.
Review the reported fix. Update phplist/phplist3 to 3.7.0-RC5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 13, 2026

Sources and claim methodology

Upstream source description

phpList before 3.7.0-RC5 fail to enforce CSRF token validation on the bounce rule deletion endpoint (bouncerules.php / bouncerule.php). The deletion is performed via a GET request (?page=bouncerules&del=N), and the central CSRF check (verifyCsrfGetToken) is invoked with enforce=false, so it only validates the token when a 'tk' parameter is present. A remote attacker can trick an authenticated administrator into loading a crafted URL (e.g., embedded in an image tag) to delete arbitrary bounce rules from the phplist_bounceregex table without a valid CSRF token.

Quoted source text, attributed separately from HOL analysis.