Stored XSS in TinyMCE via unsanitized data-mce-* attributes
CVE-2026-47759 is a stored cross-site scripting vulnerability in TinyMCE affecting versions prior to 5.11.1, 7.9.3, and 8.5.1. The flaw is caused by improper handling of internal data-mce-* attributes, specifically data-mce-href, data-mce-src, and data-mce-style. TinyMCE preserves user-entered values in these attributes during editing, then during serialization and content generation (for example when editor.getContent() is invoked), it copies those values back into the corresponding standard href, src, and style attributes. While TinyMCE validates standard href and src attributes against unsafe protocols, equivalent schema-level validation is not applied to the data-mce-* variants. As a result, attacker-controlled malicious values can be stored in data-mce-* attributes and later overwrite previously sanitized attributes during serialization, bypassing validation and producing stored XSS in rendered content.
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Exploits
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Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A TinyMCE vulnerability that allows abuse of prefixed source and hyperlink attributes to bypass safe settings during serialization, leading to script injection.
A TinyMCE vulnerability caused by unsafe handling of internal data-mce-* attributes during serialization, allowing unchecked values to overwrite sanitized href, src, and style attributes and bypass protocol validation.
The version that knows your environment.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.