GHSA-q65m-pv3f-wr5r
Suggest an improvement- Source
- https://github.com/advisories/GHSA-q65m-pv3f-wr5r
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/02/GHSA-q65m-pv3f-wr5r/GHSA-q65m-pv3f-wr5r.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/GHSA-q65m-pv3f-wr5r
- Aliases
- Published
- 2020-02-24T17:33:44Z
- Modified
- 2024-09-13T15:23:41.382687Z
- Severity
-
- 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
- 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator
- Summary
- XSS in Bleach when noscript and raw tag whitelisted
- Details
-
Impact
A mutation XSS affects users calling
bleach.cleanwithnoscriptand a raw tag (see below) in the allowed/whitelisted tags option.Patches
v3.1.1
Workarounds
modify
bleach.cleancalls to not whitelistnoscriptand one or more of the following raw tags:title textarea script style noembed noframes iframe xmpA strong Content-Security-Policy without
unsafe-inlineandunsafe-evalscript-srcs) will also help mitigate the risk.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1615315
- https://cure53.de/fp170.pdf
- https://nvd.nist.gov/vuln/detail/CVE-2020-6802
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach
Credits
- Reported by Yaniv Nizry from the CxSCA AppSec group at Checkmarx
For more information
If you have any questions or comments about this advisory:
- Open an issue at https://github.com/mozilla/bleach/issues
- Email us at security@mozilla.org
- References
-
- https://github.com/mozilla/bleach/security/advisories/GHSA-q65m-pv3f-wr5r
- https://nvd.nist.gov/vuln/detail/CVE-2020-6802
- https://github.com/mozilla/bleach/commit/f77e0f6392177a06e46a49abd61a4d9f035e57fd
- https://advisory.checkmarx.net/advisory/CX-2020-4276
- https://bugzilla.mozilla.org/show_bug.cgi?id=1615315
- https://cure53.de/fp170.pdf
- https://github.com/mozilla/bleach
- https://github.com/pypa/advisory-database/tree/main/vulns/bleach/PYSEC-2020-27.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/72R4VFFHDRSQMNT7IZU3X2755ZP4HGNI
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OCNLM2MGQTOLCIVVYS2Z5S7KOQJR5JC4
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YTULPQB7HVPPYWEYVNHJGDTSPVIDHIZX
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach
Affected packages
PyPI / bleach
Package
- Name
- bleach
- View open source insights on deps.dev
- Purl
- pkg:pypi/bleach