---
id: CVE-2026-55744
title: 'Cotonti: Cross-Site Request Forgery in the Personal File Storage (PFS) module'
summary: 'Cotonti: Cross-Site Request Forgery in the Personal File Storage (PFS) module'
severity: high
cvss: 8.1
cwe:
  - CWE-352
vendor: cotonti
product: cotonti/cotonti
ecosystem: composer
affected:
  - cotonti/cotonti <= 1.0.0
published: '2026-06-18'
updated: '2026-06-19'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-wx35-cv59-9gwr'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55744'
  - url: 'https://github.com/Cotonti/Cotonti'
  - url: >-
      https://github.com/Cotonti/Cotonti/blob/f43f1fc38ba4e02027786dad9dac1435c7c52b30/modules/pfs/inc/pfs.main.php#L118
  - url: 'https://github.com/advisories/GHSA-wx35-cv59-9gwr'
tags:
  - ghsa
  - composer
epss: 0.00148
epssPercentile: 0.04408
ingestedAt: '2026-06-29T14:31:47.139Z'
---

## Overview

Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the Personal File Storage (PFS) module. In modules/pfs/inc/pfs.main.php, the file upload action ('a=upload') processes uploaded files without calling cot_check_xg() to validate the anti-CSRF token, even though sibling actions such as 'delete' (line 272) do. A remote attacker who lures an authenticated user into visiting a malicious page can force the browser to submit a forged multipart request that uploads arbitrary files into the victim's PFS storage.

## Affected packages

- `cotonti/cotonti <= 1.0.0`

## Remediation

Refer to the advisory for the patched release.