CVE-2023-45819

Cross-site Scripting vulnerability in TinyMCE notificationManager.open API

Description

TinyMCE is an open source rich text editor. A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s Notification Manager API. The vulnerability exploits TinyMCE's unfiltered notification system, which is used in error handling. The conditions for this exploit requires carefully crafted malicious content to have been inserted into the editor and a notification to have been triggered. When a notification was opened, the HTML within the text argument was displayed unfiltered in the notification. The vulnerability allowed arbitrary JavaScript execution when an notification presented in the TinyMCE UI for the current user. This issue could also be exploited by any integration which uses a TinyMCE notification to display unfiltered HTML content. This vulnerability has been patched in TinyMCE 5.10.8 and TinyMCE 6.7.1 by ensuring that the HTML displayed in the notification is sanitized, preventing the exploit. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 2.84% Top 15%
Vendor Advisory github.com
Affected: tinymce tinymce
Published at:
Updated at:

References

Link Tags
https://github.com/tinymce/tinymce/security/advisories/GHSA-hgqx-r2hp-jr38 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-45819?
CVE-2023-45819 has been scored as a medium severity vulnerability.
How to fix CVE-2023-45819?
To fix CVE-2023-45819, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-45819 being actively exploited in the wild?
It is possible that CVE-2023-45819 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-45819?
CVE-2023-45819 affects tinymce tinymce.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.