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A GitHub-reviewed security advisory, not necessarily under active exploitation the way our CISA KEV advisories are, but a real, disclosed vulnerability in an open-source dependency.
Affected packages
Vulnerable: >= 8.5.1, < 8.9.3
Patched in 8.9.3
Vulnerable: >= 8.5.1, < 8.9.3
Patched in 8.9.3
Vulnerable: >= 8.5.1, < 8.9.3
Patched in 8.9.3
Vulnerable: = 7.9.3
Patched in 7.9.4
Vulnerable: = 7.9.3
Patched in 7.9.4
Vulnerable: = 7.9.3
Patched in 7.9.4
Details
Stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled.
This vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first.
No official workaround available.
To avoid this vulnerability:
Upgrade to TinyMCE 8.9.3 or higher. Upgrade to TinyMCE 7.9.4 or higher.
Tiny thanks Fariskhi Vidyan and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.
Talk to us about this
Find out whether this dependency (or others like it) is actually reachable in your codebase.
Get help patching, or building dependency-scanning into your pipeline going forward.
A secure code review or supply chain review finds this before an advisory does.