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Vulnerability · Published Sep 13, 2022 · Assigned by GitHub_M

CVE-2022-36020Bypass of Cross-Site Scripting Protection in typo3/html-sanitizer

Medium 6.1

In plain English

A medium-severity cross-site scripting in html-sanitizer from TYPO3. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.8%top 42.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

The typo3/html-sanitizer package is an HTML sanitizer, written in PHP, aiming to provide XSS-safe markup based on explicitly allowed tags, attributes and values. Due to a parsing issue in the upstream package `masterminds/html5`, malicious markup used in a sequence with special HTML comments cannot be filtered and sanitized. This allows for a bypass of the cross-site scripting mechanism of `typo3/html-sanitizer`. This issue has been addressed in versions 1.0.7 and 2.0.16 of the `typo3/html-sanitizer` package. Users are advised to upgrade. There are no known workarounds for this issue.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagisttypo3/cms10.4.32GHSA-47m6-46mj-p235
Packagisttypo3/cms11.5.16GHSA-47m6-46mj-p235
Packagisttypo3/cms-core10.4.32GHSA-47m6-46mj-p235
Packagisttypo3/cms-core11.5.16GHSA-47m6-46mj-p235
Packagisttypo3/html-sanitizer1.0.7GHSA-47m6-46mj-p235
Packagisttypo3/html-sanitizer2.0.16GHSA-47m6-46mj-p235

Affected products (as reported)

VendorProductVersions
TYPO3 html-sanitizer >= 1.0.0, < 1.0.7>= 2.0.0, < 2.0.16

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References