PatchTheCVECVE-2025-3662: The FancyBox for WordPress plugin before 3.3.6 does not escape captions and titles attributes before using the
CVE-2025-3662 is a medium-severity flaw (CVSS 6.1) affecting fancybox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The FancyBox for WordPress plugin before 3.3.6 does not escape captions and titles attributes before using them to populate galleries' caption fields. The issue was received as a Contributor+ Stored XSS, however one of our researcher (Marc Montpas) escalated it to an Unauthenticated Stored XSS
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.2% (top 84%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2025-06-03 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-3662?
fancybox: upgrade to 3.3.6. Exact commands for each OS are on this page.
Is CVE-2025-3662 being exploited?
CVE-2025-3662 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-3662 affect?
CVE-2025-3662 affects fancybox. Severity is medium (CVSS 6.1). The FancyBox for WordPress plugin before 3.3.6 does not escape captions and titles attributes before using them to populate galleries' caption fields. The issue was received as a Contributor+ Stored XSS, however one of our researcher (Marc
How urgent is CVE-2025-3662?
Priority 30/100. Public exploit reference