CVE-2023-45818

Description

TinyMCE is an open source rich text editor. A mutation cross-site scripting (mXSS) vulnerability was discovered in TinyMCEs core undo and redo functionality. When a carefully-crafted HTML snippet passes the XSS sanitisation layer, it is manipulated as a string by internal trimming functions before being stored in the undo stack. If the HTML snippet is restored from the undo stack, the combination of the string manipulation and reparative parsing by either the browsers native [DOMParser API](https://developer.mozilla.org/en-US/docs/Web/API/DOMParser) (TinyMCE 6) or the SaxParser API (TinyMCE 5) mutates the HTML maliciously, allowing an XSS payload to be executed. This vulnerability has been patched in TinyMCE 5.10.8 and TinyMCE 6.7.1 by ensuring HTML is trimmed using node-level manipulation instead of string manipulation. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Risk Information

Base Score

6.1

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Score

Exploitation Probability

1.282

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2023-45819,CVE-2023-45818 are fixed in Nuget - TinyMCE 6.7.1	Windows
Vulnerabilities CVE-2023-45819,CVE-2023-45818 are fixed in Nuget - TinyMCE 5.10.8	Windows
Vulnerabilities CVE-2023-45819,CVE-2023-45818 are fixed in Nuget - TinyMCE for Linux 6.7.1	Linux
Vulnerabilities CVE-2023-45819,CVE-2023-45818 are fixed in Nuget - TinyMCE for Linux 5.10.8	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234