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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact Low

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
phplist phplist3 affected
Version Status Constraints
0 affected < 3.7.0-RC5

No data.

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/phpList/phplist3/commit/5159c3ed33a5674a8169472b50d146d97f630746 cve-icon cve-icon
https://github.com/phpList/phplist3/issues/1116 cve-icon cve-icon
https://github.com/phpList/phplist3/pull/1121 cve-icon cve-icon
https://github.com/phpList/phplist3/releases/tag/v3.7.0-RC5 cve-icon cve-icon
https://www.vulncheck.com/advisories/phplist-rc5-cross-site-request-forgery-via-bounce-rules cve-icon cve-icon
History

Thu, 13 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title phpList < 3.7.0-RC5 Cross-Site Request Forgery via Bounce Rules
Weaknesses CWE-352
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-13T18:49:13.288Z

Reserved: 2026-08-12T18:19:17.024Z

Link: CVE-2026-73481

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-13T19:17:34.267

Modified: 2026-08-13T19:17:34.267

Link: CVE-2026-73481

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-13T23:30:03Z

Weaknesses