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Medium severity · published Sep 13, 2022
CVE-2022-36020
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
6.1
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
Html Sanitizer · Typo3
1.0.0 before 1.0.7; 2.0.0 before 2.0.16 · source: NVD
Affected product
HS
Html Sanitizer
Typo3
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-36020
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-36020
Patch
https://github.com/TYPO3/html-sanitizer/commit/60bfdc7f9b394d0236e16ee4cea8372a7defa493
Third Party Advisory
https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-47m6-46mj-p235
Third Party Advisory
https://packagist.org/packages/masterminds/html5
Product
https://packagist.org/packages/typo3/html-sanitizer
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