CVE-2026-55596
RCE via trusted media embed in Plate editor allowing javascript: iframe execution.
Is CVE-2026-55596 being exploited?
Not confirmed. CVE-2026-55596 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.43% probability of exploitation in the next 30 days.
How severe is CVE-2026-55596?
CVE-2026-55596 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-55596?
Yes. A fix has been recorded for CVE-2026-55596. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55596 affect?
CVE-2026-55596 affects Plate rich-text editor versions 53.0.0 through 53.1.3 (fixed in 53.1.4), Web applications embedding Plate MediaEmbedElement. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55596?
Upgrade Plate to >=53.1.4 and block/sanitize javascript: media URLs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Stored XSS / remote code execution: crafted Plate document can set iframe src to javascript:, executing attacker script when opened, enabling data theft/session hijack.
Immediate action required
- affected>= 53.0.0 and < 53.1.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.