TinyMCE is an open source rich text editor. A mutation cross-site scripting (mXSS) vulnerability was discovered in TinyMCE’s 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 browser's 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.
References
History
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MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2023-10-19T21:18:01.297Z
Updated: 2023-10-19T21:18:01.297Z
Reserved: 2023-10-13T12:00:50.438Z
Link: CVE-2023-45818
JSON object: View
NVD Information
Status : Analyzed
Published: 2023-10-19T22:15:10.817
Modified: 2023-10-26T16:32:24.767
Link: CVE-2023-45818
JSON object: View
Redhat Information
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CWE