Open Redirect in Uninett Mod Auth Mellon
CVE-2021-3639
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.010 (60.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000
Affected products
- Uninett Mod Auth Mellon
- Mod Auth Mellon — versions Fixed in v0.18.0
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/CVE-2021-3639 (Patch, Third Party Advisory)
- github.com/latchset/mod_auth_mellon/commit/42a11261b9dad2e48d70bdff7c53dd57a12d… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3639?
- CVE-2021-3639 is a medium-severity vulnerability in Uninett Mod Auth Mellon, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2022-08-22.
- How severe is CVE-2021-3639?
- Medium severity. CVSS v3 base score is 6.1 out of 10.