# CVE-2026-93869: Cotonti open redirect in cot_url_check()

Source: https://junglewise.ai/threats/cve-2026-93869-cotonti-through-1-0-0-contains-an-open-redirect-vulnerability-in  
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-2026-93869 · Severity: medium · CVSS 6.1 · Published 2026-09-18

Cotonti is a PHP content management framework. The cot_url_check() function fails to properly validate redirect destinations, allowing attackers to redirect users to attacker-controlled websites. An attacker can craft a malicious URL that bypasses validation checks and tricks users into visiting phishing sites or other malicious hosts.

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

## Quick answers

**Is CVE-2026-93869 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93869 being exploited in the wild.

**How severe is CVE-2026-93869?** Medium severity, with a CVSS score of 6.1, published 18 September 2026.

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

**Is there a fix for CVE-2026-93869?** 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-2026-93869 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-93869?** 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 cot_url_check() function uses a regular expression lacking an end-of-string anchor to validate redirect destinations, allowing bypass via hostnames prefixed with the legitimate site domain. The ratings plugin and other redirect callers are vulnerable to this flaw. An attacker-supplied hostname starting with the expected domain will pass validation but redirect to an attacker-controlled host.

## 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/ratings/ratings.ajax.php](https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/ratings/ratings.ajax.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)