XSS in Rgrove Sanitize
CVE-2023-36823
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.007 (49.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.
Affected products
- Rgrove Sanitize — versions >= 3.0.0, < 6.0.2
- Sanitize_project Sanitize
- Debian Debian_linux — versions 10.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (Mailing List)
Frequently asked questions
- What is CVE-2023-36823?
- CVE-2023-36823 is a high-severity vulnerability in Rgrove Sanitize, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2023-07-06.
- How severe is CVE-2023-36823?
- High severity. CVSS v3 base score is 7.1 out of 10.