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PatchSiren cyber security CVE debrief

CVE-2026-47761 tinymce CVE debrief

TinyMCE versions prior to 5.11.1, 7.9.3, and 8.5.1 contain a stored cross-site scripting (XSS) vulnerability in the media plugin. Attackers can inject malicious scripts through crafted data-mce-* attributes, which execute when content is rendered. This affects users with the media plugin enabled. The vulnerability was disclosed on 2026-05-28 and carries a HIGH severity CVSS score of 8.7.

Vendor
tinymce
Product
Unknown
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-28
Original CVE updated
2026-05-28
Advisory published
2026-05-28
Advisory updated
2026-05-28

Who should care

Organizations using TinyMCE with the media plugin enabled, particularly those accepting user-generated content or operating multi-user editorial workflows

Technical summary

The vulnerability exists in TinyMCE's media plugin where insufficient sanitization of data-mce-* attributes allows attacker-controlled JavaScript to persist in stored content. When this content is later rendered, the injected scripts execute in the victim's browser context. The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N reflects network attack vector, low complexity, required user interaction, and changed scope with high impact to confidentiality and integrity.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade TinyMCE to version 5.11.1, 7.9.3, or 8.5.1 or later depending on your major version branch
  • Review and sanitize any stored content that may contain malicious data-mce-* attributes
  • Verify media plugin usage and consider temporary disablement if patching is delayed
  • Audit application logs for suspicious content submissions prior to patch deployment

Evidence notes

CVE published 2026-05-28; NVD status Analyzed; vendor advisory confirms patch availability; CPE ranges confirm affected versions across 5.x, 6.x-7.x, and 8.x branches

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47761 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47761

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47761 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47761

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.