---
id: CVE-2026-73481
title: >-
  phpList before 3.7.0-RC5 fail to enforce CSRF token validation on the bounce
  rule deletion endpoint (bouncerules.php / bouncerule.php)
summary: >-
  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 (ve…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L'
cwe:
  - CWE-352
published: '2026-08-13'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:06:30.133'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73481'
references:
  - url: >-
      https://github.com/phpList/phplist3/commit/5159c3ed33a5674a8169472b50d146d97f630746
    label: disclosure@vulncheck.com
  - url: 'https://github.com/phpList/phplist3/issues/1116'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/phpList/phplist3/pull/1121'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/phpList/phplist3/releases/tag/v3.7.0-RC5'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/phplist-rc5-cross-site-request-forgery-via-bounce-rules
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00222
epssPercentile: 0.11403
ingestedAt: '2026-09-24T20:51:40.200Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.