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CVE-2024-21910 is a cross-site scripting vulnerability in TinyMCE before version 5.10.0 affecting URL processing in the image and link plugins. A remote, unauthenticated attacker can supply crafted image or link URLs that bypass intended sanitization during editing workflows, resulting in arbitrary JavaScript execution in the browser of a user editing content. The issue is triggered when the malicious URL is introduced into editor content and subsequently processed by the vulnerable plugin logic.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A prior TinyMCE XSS vulnerability via crafted image/link URLs, mentioned for background.
A historical TinyMCE XSS vulnerability mentioned only as background in the vendor security history table.
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.