CVE-2011-1579

Public Exploit

Description

The checkCss function in includes/Sanitizer.php in the wikitext parser in MediaWiki before 1.16.3 does not properly validate Cascading Style Sheets (CSS) token sequences, which allows remote attackers to conduct cross-site scripting (XSS) attacks or obtain sensitive information by using the \2f\2a and \2a\2f hex strings to surround CSS comments.

Category

5.8
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.20% Top 25%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory fedoraproject.org Vendor Advisory wikimedia.org Vendor Advisory secunia.com Vendor Advisory vupen.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058588.html vendor advisory
https://bugzilla.wikimedia.org/show_bug.cgi?id=28450
http://www.vupen.com/english/advisories/2011/0978 patch vendor advisory vdb entry
http://www.mediawiki.org/wiki/Special:Code/MediaWiki/85856 patch exploit
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/059235.html vendor advisory
http://www.securityfocus.com/bid/47354 vdb entry
http://secunia.com/advisories/44142 third party advisory vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058910.html vendor advisory
http://www.vupen.com/english/advisories/2011/1151 vdb entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/66738 vdb entry
http://www.debian.org/security/2011/dsa-2366 vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=696360
http://lists.wikimedia.org/pipermail/mediawiki-announce/2011-April/000096.html vendor advisory mailing list
http://www.vupen.com/english/advisories/2011/1100 vdb entry
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/059232.html vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=695577
http://openwall.com/lists/oss-security/2011/04/13/15 mailing list

Frequently Asked Questions

What is the severity of CVE-2011-1579?
CVE-2011-1579 has been scored as a medium severity vulnerability.
How to fix CVE-2011-1579?
To fix CVE-2011-1579, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-1579 being actively exploited in the wild?
It is possible that CVE-2011-1579 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.