CVE-2011-1579
The checkCss function in includes/Sanitizer.php in the wikitext parser in MediaWiki before 1.16.3...
CVE-2011-1579 is a medium vulnerability (CVSS 5.8) in Mediawiki, published April 27, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.92%, the 80th percentile. Fixed in mediawiki 1:1.15.5-5.
- Severity
- 5.8 MediumCVSS 2.0, NVD
- Exploit chance
- 1.92%EPSS, 80th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
1:1.15.5-5mediawiki +4 more
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.
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mediawikiDebian:12 | before 1:1.15.5-5 | 1:1.15.5-5 |
mediawikiDebian:13 | before 1:1.15.5-5 | 1:1.15.5-5 |
mediawikiDebian:14 | before 1:1.15.5-5 | 1:1.15.5-5 |
mediawikiDebian:6.0 From an advisory covering 6 CVEs | before 1:1.15.5-2squeeze2, plus listed versions 1:1.15.5-21:1.15.5-2squeeze1 | 1:1.15.5-2squeeze2 |
mediawikiDebian:5.0 From an advisory covering 6 CVEs | before 1:1.12.0-2lenny9, plus listed versions 1:1.12.0-2lenny21:1.12.0-2lenny31:1.12.0-2lenny3~bpo40+11:1.12.0-2lenny41:1.12.0-2lenny51:1.12.0-2lenny61:1.12.0-2lenny71:1.12.0-2lenny8 | 1:1.12.0-2lenny9 |
What each source reports
NVD Score used
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.
- Record
CVE-2011-1579- CVSS 2.0
- 5.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2011-1579- Updated
- 2026-11-02
EUVDEUVD-2011-1580No score
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.
- Record
EUVD-2011-1580- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rwjq-pqc6-6rcpNo score
The checkCss function in includes/Sanitizer.php in the wikitext parser in MediaWiki before 1.16.3...
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.
- Record
GHSA-rwjq-pqc6-6rcp- Weakness
- CWE-20
- Updated
- 2026-11-02
OSVNo score
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.
- Record
CVE-2011-1579- Updated
- 2026-11-02
OSVDEBIAN-CVE-2011-1579No score
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.
- Record
DEBIAN-CVE-2011-1579- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
lists.fedoraproject.org/pipermail/package-announce/2011-April/058588.html
bugzilla.wikimedia.org/show_bug.cgi?id=28450
vupen.com/english/advisories/2011/0978
mediawiki.org/wiki/Special:Code/MediaWiki/85856
securityfocus.com/bid/47354
Show 14 moreShow less
secunia.com/advisories/44142
exchange.xforce.ibmcloud.com/vulnerabilities/66738
debian.org/security/2011/dsa-2366
bugzilla.redhat.com/show_bug.cgi?id=696360
lists.wikimedia.org/pipermail/mediawiki-announce/2011-April/000096.html
openwall.com/lists/oss-security/2011/04/13/15
nvd.nist.gov/vuln/detail/CVE-2011-1579
github.com/advisories/GHSA-rwjq-pqc6-6rcp
security-tracker.debian.org/tracker/CVE-2011-1579