CVE-2026-100523
MEDIUMCVSS 6.1Description
Cotonti through 1.0.0 contains an open redirect vulnerability in message.php that base64-decodes the redirect parameter without domain validation. Unauthenticated attackers can craft malicious links with encoded external URLs to redirect users to arbitrary sites via meta refresh tags for phishing attacks.
Timeline
Published:September 26th, 2026 1:17 AM
Last modified:October 5th, 2026 3:17 PM
CVSS Scoring
CVSS v3: 6.1 (MEDIUM)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://github.com/Cotonti/Cotonti
- https://github.com/Cotonti/Cotonti/blob/1.0.0/message.php
- https://github.com/Cotonti/Cotonti/blob/1.0.0/system/common.php
- https://github.com/Cotonti/Cotonti/issues/1907
- https://github.com/Cotonti/Cotonti/pull/1908
- https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-message-php-redirect-parameter
Source: NIST NVD · Data may lag official sources by up to one minute