CVE-2023-36823
Description
Sanitize is an allowlist-based HTML and CSS sanitizer. Using carefully crafted input, an attacker may be able to sneak arbitrary HTML and CSS through Sanitize starting with version 3.0.0 and prior to version 6.0.2 when Sanitize is configured to use the built-in "relaxed" config or when using a custom config that allows `style` elements and one or more CSS at-rules. This could result in cross-site scripting or other undesired behavior when the malicious HTML and CSS are rendered in a browser. Sanitize 6.0.2 performs additional escaping of CSS in `style` element content, which fixes this issue. Users who are unable to upgrade can prevent this issue by using a Sanitize config that doesn't allow `style` elements, using a Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence `</` as `<\/` in `style` element content.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.0.2-1 |
| sid | Fixed | 6.0.2-1 |
| forky | Fixed | 6.0.2-1 |
| bullseye | Fixed | 5.2.1-2+deb11u1 |
| bookworm | Fixed | 6.0.0-1.1+deb12u1 |
References
- https://github.com/rgrove/sanitize/releases/tag/v6.0.2
- https://github.com/rgrove/sanitize/security/advisories/GHSA-f5ww-cq3m-q3g7
- https://nvd.nist.gov/vuln/detail/CVE-2023-36823
- https://github.com/rgrove/sanitize/commit/76ed46e6dc70820f38efe27de8dabd54dddb5220
- https://github.com/rgrove/sanitize
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sanitize/CVE-2023-36823.yml
- https://lists.debian.org/debian-lts-announce/2023/11/msg00008.html
- https://security-tracker.debian.org/tracker/CVE-2023-36823
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.