CVE-2021-42040
First published: Wed Oct 06 2021(Updated: )
An issue was discovered in MediaWiki through 1.36.2. A parser function related to loop control allowed for an infinite loop (and php-fpm hang) within the Loops extension because egLoopsCountLimit is mishandled. This could lead to memory exhaustion.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MediaWiki MediaWiki | <=1.36.2 | |
| <=1.36.2 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-42040?
CVE-2021-42040 is a vulnerability discovered in MediaWiki through version 1.36.2, which allows for an infinite loop and potential memory exhaustion.
How severe is CVE-2021-42040?
CVE-2021-42040 has a severity rating of 7.5 out of 10, which is considered high.
What software is affected by CVE-2021-42040?
MediaWiki versions up to and including 1.36.2 are affected by CVE-2021-42040.
How can CVE-2021-42040 be exploited?
CVE-2021-42040 can be exploited by using a parser function related to loop control, which can cause an infinite loop and potential memory exhaustion.
Is there a fix available for CVE-2021-42040?
Yes, a fix for CVE-2021-42040 is available in newer versions of MediaWiki. It is recommended to upgrade to a fixed version.
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