CVE-2026-93869
Cotonti through 1.0.0 Open Redirect via Unanchored cot_url_check() Regex
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-601 |
| Vendor | cotonti |
| Product | cotonti |
| Published | Sep 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Cotonti / Cotonti
0 ≤ 1.0.0
References
github.com: https://github.com/Cotonti/Cotonti/issues/1891 github.com: https://github.com/Cotonti/Cotonti/pull/1899 github.com: https://github.com/Cotonti/Cotonti/blob/1.0.0/system/functions.php github.com: https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/ratings/ratings.ajax.php github.com: https://github.com/Cotonti/Cotonti vulncheck.com: https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-unanchored-cot-url-check-regex
Credits
🔍 Harsh Raj Singhania