CVE-2023-43643 json
mXSS in AntiSamy
published 2023-10-09 3 y ago modified 2026-09-10 1 mo ago also GHSA-pcf2-gh6g-h5r2 , EUVD-2023-2788
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
AntiSamy is a library for performing fast, configurable cleansing of HTML coming from untrusted sources. Prior to version 1.7.4, there is a potential for a mutation XSS (mXSS) vulnerability in AntiSamy caused by flawed parsing of the HTML being sanitized. To be subject to this vulnerability the `preserveComments` directive must be enabled in your policy file and also allow for certain tags at the same time. As a result, certain crafty inputs can result in elements in comment tags being interpreted as executable when using AntiSamy's sanitized output. This issue has been patched in AntiSamy 1.7.4 and later.
Patch / fix
- maven org.owasp.antisamy:antisamy 1.7.4
- antisamy_project antisamy 1.7.4
- libowasp-antisamy-java Debian 14, Debian 13 1.7.4-1
debian advisories DEBIAN-CVE-2023-43643
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/nahsra/antisamy/security/advisories/GHSA-pcf2-gh6g-h5r2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.owasp.antisamy:antisamy | <1.7.4 |
1.7.4 |
Affected products
- nahsra antisamy
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/nahsra/antisamy/releases/tag/v1.7.4
web, patch
-
github.com
/nahsra/antisamy/security/advisories/GHSA-pcf2-gh6g-h5r2
web, exploit, mitigation, product, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-43643
advisory
-
github.com
/nahsra/antisamy
package
Sources
- CVE List CVE-2023-43643
- GitHub Advisory GHSA-pcf2-gh6g-h5r2
- NVD CVE-2023-43643
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