CVE-2026-77140CWE-639CWE-862broken-access-control

CVE-2026-77140

published August 25, 2026

CVSS
8.7
EPSS
0%
Percentile
33.7
In the wild
Unconfirmed
What it is

The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite that record without a valid edit link or any ownership check.

The record
Technical detail
CVSS
8.7 · NONE
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00406 · 33.7th percentile
Weaknesses
CWE-639 · Authorization Bypass Through User-Controlled Key; CWE-862 · Missing Authorization
Published
2026-08-25T13:17Z
References (1)
https://typo3.org/security/advisory/typo3-ext-sa-2026-018 · f4fb688c-4412-4426-b4b8-421ecf27b14a
EPSS history
Timeline
  • 26 AUG 08:27Z
    EPSS moved — → 0%
    epss
  • 25 AUG 09:00Z
    Broken Access Control in extension "Telephone Directory" (telephonedirectory)
    cvelistv5