CVE-2026-100523
Medium
Description
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.
SeverityMedium
CVSS6.1
Exploit probability—
Product
Cotonti
PublishedSep 26, 2026
First seenSep 26, 2026
Weakness typeCWE-601Open redirect
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Cotonti Cotonti | v ≤ 1.0.0 | — |
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