---
id: CVE-2026-93873
title: >-
  Cotonti through 1.0.0 fails to validate anti-CSRF tokens in the contact plugin
  submission handler, allowing attackers to forge messages
summary: >-
  Cotonti through 1.0.0 fails to validate anti-CSRF tokens in the contact plugin
  submission handler, allowing attackers to forge messages. Attackers can
  auto-submit contact forms from attacker-controlled pages to send forged
  messages attri…
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-2026-93873'
references:
  - url: 'https://github.com/Cotonti/Cotonti'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/contact/contact.php'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cotonti/Cotonti/issues/1895'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cotonti/Cotonti/pull/1903'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/cotonti-through-1.0.0-cross-site-request-forgery-in-the-contact-plugin
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cotonti/Cotonti/issues/1895'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0019
epssPercentile: 0.07645
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T20:20:44.146800Z'
ingestedAt: '2026-09-18T20:51:25.690Z'
---

## Overview

Cotonti through 1.0.0 fails to validate anti-CSRF tokens in the contact plugin submission handler, allowing attackers to forge messages. Attackers can auto-submit contact forms from attacker-controlled pages to send forged messages attributed to authenticated victims to the administrator inbox.

## Remediation

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