Vulnerability · Published Sep 18, 2026 · Assigned by VulnCheck
CVE-2026-93871Cotonti through 1.0.0 Stored Open Redirect via Page redir: Prefix
Medium 5.4
In plain English
A medium-severity open redirect in Cotonti from Cotonti. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.3%top 80.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Cotonti through 1.0.0 fails to validate redirect destinations in page bodies prefixed with redir:, allowing authenticated users with page creation or edit permissions to store redirects to arbitrary external hosts. Attackers can craft pages on trusted domains that redirect visitors to malicious sites for phishing attacks without administrative privileges.
Affected products (as reported)
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References
- https://github.com/Cotonti/Cotonti/issues/1893 issue-tracking
- https://github.com/Cotonti/Cotonti/pull/1901 patch, issue-tracking
- https://github.com/Cotonti/Cotonti/blob/1.0.0/modules/page/inc/page.main.php technical-description
- https://github.com/Cotonti/Cotonti product
- VulnCheck Advisory: Cotonti through 1.0.0 Stored Open Redirect via Page redir: Prefix third-party-advisory