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CVE-2023-48219 is a mutation cross-site scripting vulnerability in TinyMCE affecting core undo/redo functionality as well as certain APIs and plugins that serialize and re-parse editor content. The flaw arises because text nodes under specific parent elements are not escaped during serialization in accordance with the HTML standard. If an attacker can introduce text containing a special internal marker character and combine it with suitable HTML patterns, the resulting content can survive TinyMCE’s initial sanitization when parsed into the editor body. Later, when TinyMCE removes the internal marker and re-parses the serialized content, the mutated markup can become active script-bearing HTML and trigger cross-site scripting in the victim’s browser.
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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 mutation-XSS vulnerability mentioned as part of vendor security history.
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.