CVE-2024-21908: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
TinyMCE versions before 5.9.0 are affected by a stored cross-site scripting vulnerability. An unauthenticated and remote attacker could insert crafted HTML into the editor resulting in arbitrary JavaScript execution in another user's browser.
AI Analysis
Technical Summary
CVE-2024-21908 is a stored cross-site scripting vulnerability affecting TinyMCE versions prior to 5.9.0. An unauthenticated remote attacker can exploit this issue by inserting malicious HTML content into the TinyMCE editor. When other users load the affected content, the injected JavaScript executes in their browsers, potentially compromising their session or data. The vulnerability arises from improper neutralization of input during web page generation, classified under CWE-79.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of another user's browser session. This can lead to information disclosure, session hijacking, or other client-side attacks. The vulnerability does not affect availability and requires user interaction (UI:R) but no privileges or authentication (PR:N).
Mitigation Recommendations
Upgrade TinyMCE to version 5.9.0 or later, where this vulnerability has been fixed. Since the vulnerability affects versions before 5.9.0, applying the official update is the recommended remediation. No vendor advisory was provided to indicate alternative mitigations or temporary fixes.
CVE-2024-21908: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Description
TinyMCE versions before 5.9.0 are affected by a stored cross-site scripting vulnerability. An unauthenticated and remote attacker could insert crafted HTML into the editor resulting in arbitrary JavaScript execution in another user's browser.
CVSS v3.1
Score 6.1medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2024-21908 is a stored cross-site scripting vulnerability affecting TinyMCE versions prior to 5.9.0. An unauthenticated remote attacker can exploit this issue by inserting malicious HTML content into the TinyMCE editor. When other users load the affected content, the injected JavaScript executes in their browsers, potentially compromising their session or data. The vulnerability arises from improper neutralization of input during web page generation, classified under CWE-79.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of another user's browser session. This can lead to information disclosure, session hijacking, or other client-side attacks. The vulnerability does not affect availability and requires user interaction (UI:R) but no privileges or authentication (PR:N).
Mitigation Recommendations
Upgrade TinyMCE to version 5.9.0 or later, where this vulnerability has been fixed. Since the vulnerability affects versions before 5.9.0, applying the official update is the recommended remediation. No vendor advisory was provided to indicate alternative mitigations or temporary fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2024-01-03T14:21:17.583Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6929c9154121026312b544c7
Added to database: 11/28/2025, 16:08:53 UTC
Last enriched: 07/15/2026, 09:45:03 UTC
Last updated: 07/23/2026, 20:51:58 UTC
Views: 276
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