CVE-2021-31550
MEDIUMCVSS 5.4/10EPSS 0.45%
Last modified
CVE-2021-31550 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An issue was discovered in the CommentBox extension for MediaWiki through 1.35.2. Via crafted configuration variables, a malicious actor could introduce XSS payloads into various layers.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
Description
An issue was discovered in the CommentBox extension for MediaWiki through 1.35.2. Via crafted configuration variables, a malicious actor could introduce XSS payloads into various layers.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | <= 1.35.2 |
References
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Commentbox/+/651934/Issue Tracking, Vendor Advisory
- https://phabricator.wikimedia.org/T270767Third Party Advisory
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Commentbox/+/651934/Issue Tracking, Vendor Advisory
- https://phabricator.wikimedia.org/T270767Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-31550?
An issue was discovered in the CommentBox extension for MediaWiki through 1.35.2. Via crafted configuration variables, a malicious actor could introduce XSS payloads into various layers.
How severe is CVE-2021-31550?
CVE-2021-31550 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31550?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-31550?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST