---
id: CVE-2026-93870
title: >-
  Cotonti through 1.0.0 fails to validate anti-CSRF tokens in the ratings plugin
  AJAX handler, allowing attackers to forge ratings on behalf of authenticated
  users
summary: >-
  Cotonti through 1.0.0 fails to validate anti-CSRF tokens in the ratings plugin
  AJAX handler, allowing attackers to forge ratings on behalf of authenticated
  users. Attackers can craft malicious pages that auto-submit POST requests to
  modi…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-352
vendor: Cotonti
product: Cotonti
affected:
  - Cotonti <= 1.0.0
published: '2026-09-18'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:53:07.383'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93870'
references:
  - url: 'https://github.com/Cotonti/Cotonti'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/ratings/ratings.ajax.php
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cotonti/Cotonti/issues/1892'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cotonti/Cotonti/pull/1900'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/cotonti-through-1.0.0-cross-site-request-forgery-in-the-ratings-plugin-ajax-handler
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cotonti/Cotonti/issues/1892'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0019
epssPercentile: 0.07592
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T15:40:37.403356Z'
ingestedAt: '2026-09-18T20:51:25.689Z'
---

## Overview

Cotonti through 1.0.0 fails to validate anti-CSRF tokens in the ratings plugin AJAX handler, allowing attackers to forge ratings on behalf of authenticated users. Attackers can craft malicious pages that auto-submit POST requests to modify stored rating data when visited by logged-in users.

## Remediation

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