---
id: CVE-2026-55741
title: >-
  Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site
  Request Forgery in the administration configuration handler
summary: >-
  Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site
  Request Forgery in the administration configuration handler. In
  system/admin/admin.config.php, the configuration update action ('a=update')
  processes POST data vi…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-352
published: '2026-06-18'
updated: '2026-08-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55741'
references:
  - url: 'https://github.com/Cotonti/Cotonti'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
  - url: >-
      https://github.com/Cotonti/Cotonti/blob/f43f1fc38ba4e02027786dad9dac1435c7c52b30/system/admin/admin.config.php#L55
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
tags:
  - nvd
epss: 0.00208
epssPercentile: 0.09612
ingestedAt: '2026-08-10T12:39:47.037Z'
---

## Overview

Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration configuration handler. In system/admin/admin.config.php, the configuration update action ('a=update') processes POST data via cot_config_update_options without calling cot_check_xg to validate the anti-CSRF token (the 'x' parameter), unlike other admin handlers (e.g. admin.structure.php, admin.cache.php).

## Remediation

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