CVE-2021-3639
6.1
MEDIUM
CVSS 3.1
EPSS 0.19%
Description
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.
How to fix CVE-2021-3639
To remediate CVE-2021-3639, upgrade the affected package to a fixed version below.
- —upgrade to 0.17.0-1+deb11u1 or later
Is CVE-2021-3639 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.17.0-1+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |