CVE-2022-21710: Cross-site Scripting in ShortDescription extension
First published: Mon Jan 24 2022(Updated: )
ShortDescription is a MediaWiki extension that provides local short description support. A cross-site scripting (XSS) vulnerability exists in versions prior to 2.3.4. On a wiki that has the ShortDescription enabled, XSS can be triggered on any page or the page with the action=info parameter, which displays the shortdesc property. This is achieved using the wikitext `{{SHORTDESC:<img src=x onerror=alert()>}}`. This issue has a patch in version 2.3.4.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MediaWiki | <2.3.4 |
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Reference Links
- https://github.com/StarCitizenTools/mediawiki-extensions-ShortDescription/commit/7c86644158388620c6c858258cc4e1a8de6e48ea
- https://github.com/StarCitizenTools/mediawiki-extensions-ShortDescription/commit/bf568edd892adb8528dcb64f75dddf3eeaccc12c
- https://github.com/StarCitizenTools/mediawiki-extensions-ShortDescription/security/advisories/GHSA-mgcp-qw2r-6832
Frequently Asked Questions
What is the severity of CVE-2022-21710?
CVE-2022-21710 is classified as a cross-site scripting (XSS) vulnerability, which can allow attackers to execute malicious scripts on affected MediaWiki instances.
How do I fix CVE-2022-21710?
To fix CVE-2022-21710, upgrade the MediaWiki ShortDescription extension to version 2.3.4 or later.
Which versions of the MediaWiki ShortDescription extension are affected by CVE-2022-21710?
CVE-2022-21710 affects all versions of the MediaWiki ShortDescription extension prior to 2.3.4.
What are the risks associated with CVE-2022-21710?
Exploiting CVE-2022-21710 could lead to unauthorized script execution and potential data theft on affected MediaWiki instances.
Is CVE-2022-21710 actively being exploited in the wild?
There is currently no public information confirming active exploitation of CVE-2022-21710, but it is advisable to apply the security update to mitigate risk.
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