CVE-2026-93869CWE-601

CVE-2026-93869

Medium · published September 19, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
28.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00360 · 28.6th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2026-09-19T00:17Z
References (7)
https://github.com/Cotonti/Cotonti · [email protected]https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/ratings/ratings.ajax.php · [email protected]https://github.com/Cotonti/Cotonti/blob/1.0.0/system/functions.php · [email protected]https://github.com/Cotonti/Cotonti/issues/1891 · [email protected]https://github.com/Cotonti/Cotonti/pull/1899 · [email protected]https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-unanchored-cot-url-check-regex · [email protected]https://github.com/Cotonti/Cotonti/issues/1891 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 20 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 18 SEP 19:56Z
    Cotonti through 1.0.0 Open Redirect via Unanchored cot_url_check() Regex
    cvelistv5