CVE-2026-93869

Cotonti through 1.0.0 contains an open redirect vulnerability in the cot_url_check() function that validates redirect destinations using a regular expression lacking an end-of-string anchor. Attackers can bypass the redirect guard by supplying hostnames beginning with the site domain to redirect users to attacker-controlled hosts through the ratings plugin or other redirect callers.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
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/system/functions.php
https://github.com/Cotonti/Cotonti/issues/1891
https://github.com/Cotonti/Cotonti/pull/1899
https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-unanchored-cot-url-check-regex
https://github.com/Cotonti/Cotonti/issues/1891

Configurations

No configuration.

History

21 Sep 2026, 16:17

Type	Values Removed	Values Added
References	~~() https://github.com/Cotonti/Cotonti/issues/1891 -~~	() https://github.com/Cotonti/Cotonti/issues/1891 -

18 Sep 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-18 20:17

Updated : 2026-09-22 20:53

NVD link : CVE-2026-93869

Mitre link : CVE-2026-93869

CVE.ORG link : CVE-2026-93869

JSON object : View

Products Affected

No product.

CWE

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

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