CVE-2025-6674: Drupal CKEditor5 Youtube · Cross-site Scripting
Affects Drupal CKEditor5 YoutubeSource CVE Database V5
Not known to be exploited · CVSS 6.1 Medium : upgrade to 1.0.3 when convenient.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.0.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 26 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Upgrade drupal/ckeditor5_youtube to 1.0.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Packagistdrupal/ckeditor5_youtubepkg:composer/drupal/ckeditor5_youtubeOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Organizations should immediately audit their Drupal installations to identify the presence and version of the CKEditor5 Youtube plugin. Upgrading to version 1.0.3 or later, once available, is critical to remediate the vulnerability. In the interim, disabling or removing the CKEditor5 Youtube plugin can mitigate risk. Implementing Content Security Policy (CSP) headers can reduce the impact of XSS by restricting script execution sources. Additionally, applying strict input validation and output encoding on all user-supplied content, especially embedded media URLs, is essential. Web Application Firewalls (WAFs) with rules targeting XSS payloads can provide temporary protection. Regular security scanning and monitoring for anomalous activities related to script injection attempts should be established. Finally, educating developers and content managers on secure content embedding practices will help prevent similar vulnerabilities.
Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal CKEditor5 Youtube allows Cross-Site Scripting (XSS).This issue affects CKEditor5 Youtube: from 0.0.0 before 1.0.3.