UpHeron
All vulnerabilities

Servers and applications

CVE-2011-1579

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.

Severity
Medium 5.8
Published
27 Apr 2011
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
1.9% in the next 30 daysHigher than 80% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
MediaWikiServers and applications · cpe:a:mediawiki:mediawiki
  • Version 1.16.1
  • Version 1.16.0
  • Version 1.16.0-beta2
  • Version 1.16.0-beta1
All 133 release lines
  • Every version up to 1.16.2
  • Version 1.1.0
  • Version 1.2.0
  • Version 1.2.1
  • Version 1.2.2
  • Version 1.2.3
  • Version 1.2.4
  • Version 1.2.5
  • Version 1.2.6
  • Version 1.3
  • Version 1.3.1
  • Version 1.3.2
  • Version 1.3.3
  • Version 1.3.4
  • Version 1.3.5
  • Version 1.3.6
  • Version 1.3.7
  • Version 1.3.8
  • Version 1.3.9
  • Version 1.3.10
  • Version 1.3.11
  • Version 1.3.12
  • Version 1.3.13
  • Version 1.3.14
  • Version 1.3.15
  • Version 1.4-beta1
  • Version 1.4-beta2
  • Version 1.4-beta3
  • Version 1.4-beta4
  • Version 1.4-beta5
  • Version 1.4-beta6
  • Version 1.4.0
  • Version 1.4.1
  • Version 1.4.2
  • Version 1.4.3
  • Version 1.4.4
  • Version 1.4.5
  • Version 1.4.6
  • Version 1.4.7
  • Version 1.4.8
  • Version 1.4.9
  • Version 1.4.10
  • Version 1.4.11
  • Version 1.4.12
  • Version 1.4.13
  • Version 1.4.14
  • Version 1.5-alpha1
  • Version 1.5-alpha2
  • Version 1.5-beta1
  • Version 1.5-beta2
  • Version 1.5-beta3
  • Version 1.5-beta4
  • Version 1.5-rc2
  • Version 1.5-rc3
  • Version 1.5-rc4
  • Version 1.5.0
  • Version 1.5.1
  • Version 1.5.2
  • Version 1.5.3
  • Version 1.5.4
  • Version 1.5.5
  • Version 1.5.6
  • Version 1.5.7
  • Version 1.5.8
  • Version 1.6.0
  • Version 1.6.1
  • Version 1.6.2
  • Version 1.6.3
  • Version 1.6.4
  • Version 1.6.5
  • Version 1.6.6
  • Version 1.6.7
  • Version 1.6.8
  • Version 1.6.9
  • Version 1.6.10
  • Version 1.6.11
  • Version 1.6.12
  • Version 1.7.0
  • Version 1.7.1
  • Version 1.7.2
  • Version 1.7.3
  • Version 1.8.0
  • Version 1.8.1
  • Version 1.8.2
  • Version 1.8.3
  • Version 1.8.4
  • Version 1.8.5
  • Version 1.9.0-rc2
  • Version 1.9.0
  • Version 1.9.1
  • Version 1.9.2
  • Version 1.9.3
  • Version 1.9.4
  • Version 1.9.5
  • Version 1.9.6
  • Version 1.10.0-rc1
  • Version 1.10.0-rc2
  • Version 1.10.0
  • Version 1.10.1
  • Version 1.10.2
  • Version 1.10.3
  • Version 1.10.4
  • Version 1.11.0-rc1
  • Version 1.11
  • Version 1.11.1
  • Version 1.11.2
  • Version 1.12.0-rc1
  • Version 1.12.0
  • Version 1.12.1
  • Version 1.12.2
  • Version 1.12.3
  • Version 1.12.4
  • Version 1.13.0-rc1
  • Version 1.13.0-rc2
  • Version 1.13.0
  • Version 1.13.1
  • Version 1.13.2
  • Version 1.13.3
  • Version 1.13.4
  • Version 1.14.0-rc1
  • Version 1.14.0
  • Version 1.14.1
  • Version 1.15.0-rc1
  • Version 1.15.0
  • Version 1.15.1
  • Version 1.15.2
  • Version 1.15.3
  • Version 1.15.4
  • Version 1.15.5
  • Version 1.16.0-beta1
  • Version 1.16.0-beta2
  • Version 1.16.0
  • Version 1.16.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-1579
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-1579