MEDIUM
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
Published Apr 27, 2011
5.8
MEDIUMCVSS 2.0
EPSS 1.92%
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.
Affected products
No data.
OR
- ≤ 1.16.2
- 1.1.0
- 1.2.0
- 1.2.1
- 1.2.2
- 1.2.3
- 1.2.4
- 1.2.5
- 1.2.6
- 1.3
- 1.3.0
- 1.3.1
- 1.3.2
- 1.3.3
- 1.3.4
- 1.3.5
- 1.3.6
- 1.3.7
- 1.3.8
- 1.3.9
- 1.3.10
- 1.3.11
- 1.3.12
- 1.3.13
- 1.3.14
- 1.3.15
- 1.4
- 1.4
- 1.4
- 1.4
- 1.4
- 1.4
- 1.4.0
- 1.4.1
- 1.4.2
- 1.4.3
- 1.4.4
- 1.4.5
- 1.4.6
- 1.4.7
- 1.4.8
- 1.4.9
- 1.4.10
- 1.4.11
- 1.4.12
- 1.4.13
- 1.4.14
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5.0
- 1.5.1
- 1.5.2
- 1.5.3
- 1.5.4
- 1.5.5
- 1.5.6
- 1.5.7
- 1.5.8
- 1.6.0
- 1.6.1
- 1.6.2
- 1.6.3
- 1.6.4
- 1.6.5
- 1.6.6
- 1.6.7
- 1.6.8
- 1.6.9
- 1.6.10
- 1.6.11
- 1.6.12
- 1.7.0
- 1.7.1
- 1.7.2
- 1.7.3
- 1.8.0
- 1.8.1
- 1.8.2
- 1.8.3
- 1.8.4
- 1.8.5
- 1.9.0
- 1.9.0
- 1.9.1
- 1.9.2
- 1.9.3
- 1.9.4
- 1.9.5
- 1.9.6
- 1.10.0
- 1.10.0
- 1.10.0
- 1.10.1
- 1.10.2
- 1.10.3
- 1.10.4
- 1.11
- 1.11.0
- 1.11.0
- 1.11.1
- 1.11.2
- 1.12.0
- 1.12.0
- 1.12.1
- 1.12.2
- 1.12.3
- 1.12.4
- 1.13.0
- 1.13.0
- 1.13.0
- 1.13.1
- 1.13.2
- 1.13.3
- 1.13.4
- 1.14.0
- 1.14.0
- 1.14.1
- 1.15.0
- 1.15.0
- 1.15.1
- 1.15.2
- 1.15.3
- 1.15.4
- 1.15.5
- 1.16.0
- 1.16.0
- 1.16.0
- 1.16.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
5.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.92% 0.01917
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01917
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.92% (0.01917) | 79.13th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.92% (0.01917) | 77.13th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.20% (0.01198) | 77.48th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.68% (0.02682) | 90.14th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.41% (0.00413) | 73.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.41% (0.00413) | 69.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.41% (0.03407) | 84.65th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.41% (0.03407) | 83.10th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.41% (0.03407) | 66.20th | v2 (v2022.01.01) |
Weaknesses (1)
References (17)
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058588.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058910.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/059232.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/059235.html vendor-advisoryx_refsource_FEDORA
- http://lists.wikimedia.org/pipermail/mediawiki-announce/2011-April/000096.html mailing-listx_refsource_MLISTVendor Advisory
- http://openwall.com/lists/oss-security/2011/04/13/15 mailing-listx_refsource_MLIST
- http://secunia.com/advisories/44142 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.debian.org/security/2011/dsa-2366 vendor-advisoryx_refsource_DEBIAN
- http://www.mediawiki.org/wiki/Special:Code/MediaWiki/85856 x_refsource_CONFIRMExploitPatch
- http://www.securityfocus.com/bid/47354 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2011/0978 vdb-entryx_refsource_VUPENPatchVendor Advisory
- http://www.vupen.com/english/advisories/2011/1100 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2011/1151 vdb-entryx_refsource_VUPEN
- https://bugzilla.redhat.com/show_bug.cgi?id=695577 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=696360 x_refsource_CONFIRM
- https://bugzilla.wikimedia.org/show_bug.cgi?id=28450 x_refsource_CONFIRM
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66738 vdb-entryx_refsource_XF
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Apr 27, 2011
Updated Aug 6, 2024
Reserved Apr 5, 2011
Link CVE-2011-1579
CISA Vulnrichment
Updated n/a