CVE-2021-3639

6.1 mediumEPSS 1.0%

Medium (6.1) in uninett mod auth mellon. EPSS 1.0% chance of exploitation in the next 30 days.

A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.

Severity

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 63% of CVEs (scores of 2026-10-31)
CWE: CWE-601
Published: 2022-08-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

uninett:mod_auth_mellon

References

https://access.redhat.com/security/cve/CVE-2021-3639
https://bugzilla.redhat.com/show_bug.cgi?id=1980648
https://github.com/latchset/mod_auth_mellon/commit/42a11261b9dad2e48d70bdff7c53dd57a12db6f5
https://access.redhat.com/security/cve/CVE-2021-3639
https://bugzilla.redhat.com/show_bug.cgi?id=1980648

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