The Microsoft Anti-Cross Site Scripting (AntiXSS) Library 3.x and 4.0 does not properly evaluate characters after the detection of a Cascading Style Sheets (CSS) escaped character, which allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML input, aka "AntiXSS Library Bypass Vulnerability."
Published Jan 10, 2012
4.3
MEDIUMCVSS 2.0
EPSS 18.63%
Description
The Microsoft Anti-Cross Site Scripting (AntiXSS) Library 3.x and 4.0 does not properly evaluate characters after the detection of a Cascading Style Sheets (CSS) escaped character, which allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML input, aka "AntiXSS Library Bypass Vulnerability."
Affected products
No data.
- 3.1
- 4.0
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.
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 18.63% (0.18627) | 97.18th | v5 (v2026.06.15) |
| Jun 15, 2026 | 19.28% (0.19283) | 96.98th | v5 (v2026.06.15) |
| Feb 14, 2026 | 59.21% (0.59212) | 98.18th | v4 (v2025.03.14) |
| Dec 1, 2025 | 62.21% (0.62209) | 98.28th | v4 (v2025.03.14) |
| Mar 17, 2025 | 59.16% (0.59155) | 98.02th | v4 (v2025.03.14) |
| Dec 12, 2024 | 95.91% (0.95913) | 99.54th | v3 (v2023.03.01) |
| Jul 10, 2024 | 95.20% (0.95205) | 99.36th | v3 (v2023.03.01) |
| May 18, 2024 | 96.99% (0.96992) | 99.74th | v3 (v2023.03.01) |
| Mar 24, 2024 | 97.03% (0.97027) | 99.73th | v3 (v2023.03.01) |
| Jan 29, 2024 | 96.48% (0.96480) | 99.49th | v3 (v2023.03.01) |
| Dec 6, 2023 | 96.18% (0.96184) | 99.38th | v3 (v2023.03.01) |
| Oct 9, 2023 | 97.01% (0.97013) | 99.65th | v3 (v2023.03.01) |
| Aug 10, 2023 | 97.08% (0.97076) | 99.65th | v3 (v2023.03.01) |
| Mar 7, 2023 | 97.18% (0.97178) | 99.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 23.28% (0.23279) | 96.69th | v2 (v2022.01.01) |
| Dec 13, 2022 | 23.28% (0.23279) | 96.60th | v2 (v2022.01.01) |
| Mar 26, 2022 | 27.86% (0.27856) | 96.03th | v2 (v2022.01.01) |
| Feb 4, 2022 | 39.09% (0.39092) | 97.32th | v2 (v2022.01.01) |
References (7)
- http://secunia.com/advisories/47483 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/47516 third-party-advisoryx_refsource_SECUNIA
- http://www.securityfocus.com/bid/51291 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1026499 vdb-entryx_refsource_SECTRACK
- http://www.us-cert.gov/cas/techalerts/TA12-010A.html third-party-advisoryx_refsource_CERTUS Government Resource
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-007 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14314 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/47483 | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/47516 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.securityfocus.com/bid/51291 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id?1026499 | vdb-entryx_refsource_SECTRACK | |
| http://www.us-cert.gov/cas/techalerts/TA12-010A.html | third-party-advisoryx_refsource_CERTUS Government Resource | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-007 | vendor-advisoryx_refsource_MS | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14314 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.