# CVE-2026-93873: Cotonti contact plugin CSRF token validation bypass

Source: https://junglewise.ai/threats/cve-2026-93873-cotonti-through-1-0-0-fails-to-validate-anti-csrf-tokens-in-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-93873 · Severity: medium · CVSS 4.3 · Published 2026-09-18

Cotonti is a PHP content management framework used to build websites. The contact form plugin fails to validate anti-forgery tokens, allowing attackers to forge contact form submissions from victim accounts. An attacker can trick an authenticated user into visiting a malicious webpage that auto-submits contact forms with attacker-controlled content, which the administrator receives as legitimate messages from the victim.

Technologies: [Cotonti](https://junglewise.ai/threats/technologies/cotonti). Vendors: [Cotonti](https://junglewise.ai/threats/vendors/cotonti).

## Quick answers

**Is CVE-2026-93873 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93873 being exploited in the wild.

**How severe is CVE-2026-93873?** Medium severity, with a CVSS score of 4.3, published 18 September 2026.

**Which products and versions are affected?** Cotonti through 1.0.0.

**Is there a fix for CVE-2026-93873?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-93873 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-93873?** Check whether you run Cotonti at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The contact plugin's submission handler fails to validate CSRF tokens, enabling cross-site request forgery attacks. An attacker can craft a malicious webpage that auto-submits a contact form to the vulnerable Cotonti instance, causing an authenticated victim's browser to send forged messages attributed to the victim. This requires the victim to be authenticated and to visit the attacker-controlled page.

## Affected products

- Cotonti Cotonti through 1.0.0

## Timeline

- 2026-09-18: disclosed

## References

- [https://github.com/Cotonti/Cotonti](https://github.com/Cotonti/Cotonti)
- [https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/contact/contact.php](https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/contact/contact.php)

## Related threats

- [Cotonti weak token generation in user registration](https://junglewise.ai/threats/cve-2026-121553-cotonti-through-1-0-0-generates-registration-and-email-change)
- [Cotonti cross-site request forgery in admin users](https://junglewise.ai/threats/cve-2026-101093-cotonti-through-1-0-0-contains-a-cross-site-request-forgery)
- [Cotonti cross-site request forgery in extensions manager](https://junglewise.ai/threats/cve-2026-100524-cotonti-through-1-0-0-contains-a-cross-site-request-forgery)
- [Cotonti open redirect in message.php](https://junglewise.ai/threats/cve-2026-100523-cotonti-through-1-0-0-contains-an-open-redirect-vulnerability-in)
- [Cotonti reflected cross-site scripting in message.php](https://junglewise.ai/threats/cve-2026-100522-cotonti-through-1-0-0-contains-a-reflected-cross-site-scripting)