Vulnerability library
Security checkJuly 07, 2026

TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

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High severitynpmtinymce

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Description

Stored XSS vulnerability via unsanitized data-mce-* attributes (data-mce-href, data-mce-src, data-mce-style). Allows attackers to inject malicious values that override safe attributes during serialization, bypassing validation.

Recommendation

Update the tinymce package to the latest compatible version. Followings are version details:

  • Affected version(s): **<= 5.10.9 >= 8.0.0, < 8.5.1 >= 6.0.0, < 7.9.3**
  • Patched version(s): **8.5.1 7.9.3**

References

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See something that needs correcting? Let us knowUpdated July 07, 2026