# CVE-2026-55742: Cotonti CSRF in administration rights handler

Source: https://junglewise.ai/threats/cve-2026-55742-cotonti-csrf-in-administration-rights-handler  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-18. Updated: 2026-06-20  
License: CC BY 4.0 with a link back

CVE-2026-55742 · Severity: critical · CVSS 9.6 · Published 2026-06-18

Cotonti is a content management system used to build and manage websites. A security flaw in its administration panel allows an attacker to trick a logged-in administrator into unknowingly performing actions, such as granting the attacker full administrative rights. This could lead to a complete takeover of the website, theft of sensitive data, or the execution of malicious code on the server.

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

## Quick answers

**Is CVE-2026-55742 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-55742 being exploited in the wild.

**How severe is CVE-2026-55742?** Critical severity, with a CVSS score of 9.6, published 18 June 2026.

**Which products and versions are affected?** Cotonti <= 1.0.0, 1.0.0 (commit f43f1fc3); cotonti/cotonti (Packagist) <= 1.0.0, ECOSYSTEM:introduced=0,last_affected=1.0.0.

**Is there a fix for CVE-2026-55742?** 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-2026-55742 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-55742?** Check whether you run Cotonti or cotonti/cotonti (Packagist) 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

A Cross-Site Request Forgery (CSRF) vulnerability exists in Cotonti 1.0.0 (specifically commit f43f1fc3) within the 'system/admin/admin.rights.php' component. The rights update action ('a=update') fails to implement anti-CSRF token validation via the 'cot_check_xg()' function. By luring an authenticated administrator to a malicious website, a remote attacker can trigger a forged request to modify group access rights. Successful exploitation allows the attacker to elevate a controlled account to administrator status. Given that administrators can modify site templates and configurations, this vulnerability can be further leveraged to achieve Remote Code Execution (RCE).

## Affected products

- Cotonti Cotonti 1.0.0 (commit f43f1fc3)

## Identifiers

- CVE-2026-55742
- GHSA-7g3p-35vc-mgjr

## Timeline

- 2026-06-18: advisory: NVD publication date

## References

- [https://github.com/Cotonti/Cotonti](https://github.com/Cotonti/Cotonti)
- [https://github.com/Cotonti/Cotonti/blob/f43f1fc38ba4e02027786dad9dac1435c7c52b30/system/admin/admin.rights.php](https://github.com/Cotonti/Cotonti/blob/f43f1fc38ba4e02027786dad9dac1435c7c52b30/system/admin/admin.rights.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)