By-passing Cross-Site Scripting Protection in HTML Sanitizer
CVE-2023-47125

4.7MEDIUM

Key Information:

Vendor

Typo3

Status
Html-sanitizer
Vendor
CVE Published:
14 November 2023

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-47125?

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions DOM processing instructions are not handled correctly. This allows bypassing the cross-site scripting mechanism of typo3/html-sanitizer. This vulnerability has been addressed in versions 1.5.3 and 2.1.4. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected Version(s)

html-sanitizer >= 1.0.0, < 1.5.3 < 1.0.0, 1.5.3

html-sanitizer >= 2.0.0, < 2.1.4 < 2.0.0, 2.1.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

TYPO3-HTML-Sanitizer-XSS-CVE-2023-47125
Created by nikn0laty

References

https://github.com/TYPO3/html-sanitizer/security/advisori...
x_refsource_CONFIRM
https://github.com/TYPO3/html-sanitizer/commit/b8f9071725...
x_refsource_MISC
https://typo3.org/security/advisory/typo3-core-sa-2023-007
x_refsource_MISC

CVSS V3.1

Score:
4.7
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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