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By-passing Cross-Site Scripting Protection in HTML Sanitizer

Moderate
ohader published GHSA-mm79-jhqm-9j54 Nov 14, 2023

Package

composer typo3/html-sanitizer (Composer)

Affected versions

1.0.0-1.5.2, 2.0.0-2.1.3

Patched versions

1.5.3, 2.1.4

Description

CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C (4.4)

Problem

DOM processing instructions are not handled correctly. This allows bypassing the cross-site scripting mechanism of typo3/html-sanitizer.

Solution

Update to typo3/html-sanitizer versions 1.5.3 or 2.1.4 that fix the problem described.

Credits

Thanks to Yaniv Nizry and Niels Dossche who reported this issue, and to TYPO3 core & security team member Oliver Hader who fixed the issue.

References

Severity

Moderate
4.7
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CVE ID

CVE-2023-47125

Weaknesses

Credits