Security readout for executives and security teams
Plain-English summary
TinyMCE versions 4.7.11 and 4.7.12 have a cross-site scripting issue in the media embed workflow. A victim must paste malicious content into the media element embed tab. If triggered, JavaScript can run in the user’s browser, creating risk for CMS users and administrators.
Executive priority
Prioritize this where TinyMCE is used in administrative, CMS, or publishing workflows. The issue requires user interaction, but successful exploitation can execute JavaScript in a trusted user’s browser.
Technical view
The CVE describes CWE-79 in TinyMCE’s media element component. The stated impact is JavaScript code execution, with an attack vector requiring user interaction: pasting malicious content into the media element embed tab. The source bundle provides no CVSS score, named fixed version, or active exploitation evidence.
Likely exposure
Exposure is most likely in applications using TinyMCE 4.7.11 or 4.7.12 with media embed functionality available to users who paste external or untrusted content.
Exploitation context
The provided sources do not indicate active exploitation, and the CVE is not marked KEV. The documented scenario requires victim interaction, which lowers broad automated exploitation risk but still matters for privileged editor accounts.
Researcher notes
Evidence is limited to the CVE record and the referenced TinyMCE GitHub issue. No CVSS vector, fixed version, or exploitation-in-the-wild claim is present in the provided bundle.
Mitigation direction
- Inventory applications using TinyMCE and identify versions 4.7.11 or 4.7.12.
- Check TinyMCE vendor guidance and release notes for the appropriate supported remediation.
- Limit access to media embed workflows for untrusted users until remediation is confirmed.
- Treat pasted embed content as untrusted and review application-side content controls.
Validation and detection
- Confirm the deployed TinyMCE version in package manifests, bundled assets, and production builds.
- Verify whether the media element embed tab is enabled in affected editor instances.
- Review user roles that can paste or publish media embed content.
- Check vendor issue tracking for remediation details before closing the finding.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-1010091 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/tinymce/tinymce/issues/4394CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.