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CVE-2023-36823

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-6748-1
Posted Apr 24, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6748-1 - It was discovered that Sanitize incorrectly handled noscript elements under certain circumstances. An attacker could possibly use this issue to execute a cross-site scripting attack. This issue only affected Ubuntu 22.04 LTS. It was discovered that Sanitize incorrectly handled style elements under certain circumstances. An attacker could possibly use this issue to execute a cross-site scripting attack.

tags | advisory, xss
systems | linux, ubuntu
advisories | CVE-2023-23627, CVE-2023-36823
SHA-256 | ab6dc1159009d7c16992352e21fe2f624a1b8ad711051c13905b37a5aa4d784e
Download | Favorite | View
Debian Security Advisory 5616-1
Posted Feb 6, 2024
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5616-1 - It was discovered that ruby-sanitize, a whitelist-based HTML sanitizer, insufficiently sanitized style elements, which may result in cross-site scripting.

tags | advisory, xss, ruby
systems | linux, debian
advisories | CVE-2023-36823
SHA-256 | cb1891138c71065ba8a31de094547c27038e14dbb35d632d940934fd3474f59c
Download | Favorite | View
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