Server side cross-site scripting In tinymce
Description
TinyMCE Cross-Site Scripting (XSS) vulnerability through mce:protected comments
Impact
Stored XSS vulnerability via forged mce:protected comments. Allows attackers to bypass sanitization and inject scripts that execute when content is restored. Impacts users who utilize the protect option.
Patches
Patched by validating decoded mce:protected content against configured protect regex rules before restoring. Users should upgrade to the latest patched version.
Workarounds
No official workaround available.
Fix
To avoid this vulnerability:
Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract).
Acknowledgements
Tiny thanks Ivan Babenko for their help identifying this vulnerability.
Mitigation
Update Impact
Minimal update. May introduce new vulnerabilities or breaking changes.
Ecosystem | Package | Affected version | Patched versions |
|---|---|---|---|
 nuget | 7.9.3, 8.5.1 | ||
 packagist | 7.9.3, 8.5.1 | ||
 npm | 7.9.3, 8.5.1 |
Aliases
References