Stored XSS in TinyMCE media plugin
CVE-2026-47761 is a stored cross-site scripting vulnerability in TinyMCE's media plugin affecting versions prior to 5.11.1, 7.9.3, and 8.5.1. The issue arises from how the media plugin serializes rich-media elements into placeholders and preserves original properties in custom HTML5 attributes prefixed with data-mce-. Because downstream filters commonly allow arbitrary data- attributes, attacker-controlled payloads embedded in crafted data-mce-* attributes can survive sanitization and be stored persistently. When the content is later rendered, TinyMCE deserializes those attributes back into live DOM objects without adequately validating the reconstructed elements, allowing attacker-supplied script to execute in the browser.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A stored XSS vulnerability in the TinyMCE media plugin that allows malicious script injection via crafted data-mce-* attributes and custom object configurations.
A stored cross-site scripting vulnerability in TinyMCE's media plugin caused by unsafe serialization and later deserialization of rich-media properties stored in 'data-mce-*' HTML attributes, allowing attacker-controlled executable code to run in victims' browsers when edited content is viewed.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
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.