CVE-2026-76931CWE-79cross-site-scripting

CVE-2026-76931

Medium · published September 8, 2026

CVSS v3.1
6.4
EPSS
0%
Percentile
25.1
In the wild
Unconfirmed
What it is

The Zephyr Project Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘message’ parameter in all versions up to, and including, 3.3.205 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability can only be exploited when the 'Directly link to project' plugin setting is disabled.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00331 · 25.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-08T16:16Z
References (5)
https://plugins.trac.wordpress.org/browser/zephyr-project-manager/trunk/includes/Base/AjaxHandler.php#L305 · [email protected]https://plugins.trac.wordpress.org/browser/zephyr-project-manager/trunk/includes/Core/Projects.php#L1052 · [email protected]https://plugins.trac.wordpress.org/browser/zephyr-project-manager/trunk/includes/Core/Tasks.php#L1308 · [email protected]https://plugins.trac.wordpress.org/changeset/3656930/ · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/888dfcc5-a903-4b2d-846b-c93f0b33b0c7?source=cve · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 08 SEP 11:29Z
    Zephyr Project Manager <= 3.3.205 - Authenticated (Custom+) Stored Cross-Site Scripting via 'message' Parameter
    cvelistv5