CVE-2021-42046
MEDIUMCVSS 6.1/10EPSS 0.83%
Last modified
CVE-2021-42046 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. An issue was discovered in the GlobalWatchlist extension in MediaWiki through 1.36.2. The rev-deleted-user and ntimes messages were not properly escaped and allowed for users to inject HTML and JavaScript.. EPSS estimates a 0.83% chance of exploitation in the next 30 days.
Description
An issue was discovered in the GlobalWatchlist extension in MediaWiki through 1.36.2. The rev-deleted-user and ntimes messages were not properly escaped and allowed for users to inject HTML and JavaScript.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | <= 1.36.2 |
References
- https://gerrit.wikimedia.org/r/q/Ib7f9b009730fe0df283cec1169f84c7a83a58b1dPatch, Vendor Advisory
- https://gerrit.wikimedia.org/r/q/Id2204fb5afe591d63764466de35ac0aaa5999983Patch, Vendor Advisory
- https://phabricator.wikimedia.org/T286385Vendor Advisory
- https://gerrit.wikimedia.org/r/q/Ib7f9b009730fe0df283cec1169f84c7a83a58b1dPatch, Vendor Advisory
- https://gerrit.wikimedia.org/r/q/Id2204fb5afe591d63764466de35ac0aaa5999983Patch, Vendor Advisory
- https://phabricator.wikimedia.org/T286385Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42046?
An issue was discovered in the GlobalWatchlist extension in MediaWiki through 1.36.2. The rev-deleted-user and ntimes messages were not properly escaped and allowed for users to inject HTML and JavaScript.
How severe is CVE-2021-42046?
CVE-2021-42046 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.83% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42046?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2021-42046?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST