Security readout for executives and security teams
Plain-English summary
TinyMCE before 5.10.0 can let a remote unauthenticated attacker place crafted image or link URLs that execute JavaScript in an editor user's browser. Business impact is mainly account/session risk and content tampering where staff review attacker-supplied content.
Executive priority
Treat as a moderate-priority web application remediation. Prioritize systems where external users submit content reviewed by privileged staff, because successful XSS could affect editor accounts or trusted content workflows.
Technical view
CVE-2024-21910 is a CWE-79 cross-site scripting issue in TinyMCE plugins. The CVSS 3.1 score is 6.1: network reachable, low complexity, no privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is most likely in applications embedding TinyMCE versions before 5.10.0, especially CMS, admin, support, or publishing workflows where untrusted users can submit image or link URLs later opened in an editor.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires an editing user to interact with or load attacker-influenced content, so risk depends on who can submit content and who reviews it.
Researcher notes
The provided affected metadata is sparse and internally awkward, listing vendor as unknown and versions as 0, while the description states TinyMCE before 5.10.0. Rely on the vendor advisory and local asset inventory for final exposure decisions.
Mitigation direction
- Upgrade TinyMCE to 5.10.0 or later where applicable.
- Check the TinyMCE advisory for supported upgrade or backport guidance.
- If using django-tinymce, review the 3.4.0 release references.
- Restrict untrusted image and link URL input until patched.
- Ensure deployed static TinyMCE assets are actually replaced.
Validation and detection
- Inventory TinyMCE versions in packages and bundled static assets.
- Identify workflows accepting image or link URLs from untrusted users.
- Confirm editor pages load TinyMCE 5.10.0 or later.
- Review django-tinymce usage if present in the application.
- Verify no stale CDN or application caches serve vulnerable assets.
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 lookupCVE-2024-21910 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
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/tinymce/tinymce/security/advisories/GHSA-r8hm-w5f7-wj39CVE reference, VulnCheck · vendor-advisory
- https://github.com/jazzband/django-tinymce/issues/366CVE reference, VulnCheck · issue-tracking
- https://github.com/jazzband/django-tinymce/releases/tag/3.4.0CVE reference, VulnCheck · related
- https://pypi.org/project/django-tinymce/3.4.0/CVE reference, VulnCheck · related
- https://github.com/advisories/GHSA-r8hm-w5f7-wj39CVE reference, VulnCheck · vendor-advisory
- https://vulncheck.com/advisories/vc-advisory-GHSA-r8hm-w5f7-wj39CVE reference, VulnCheck · third-party-advisory
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.