CVE-2025-3662 json
FancyBox for WordPress < 3.3.6 - Unauthenticated Stored XSS
published 2025-06-03 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-16698
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 17%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- Unknown FancyBox for WordPress 3.3.6
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 17 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/4cda12f0-3c23-44ad-80ea-db2443ebcf82/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected products
- Unknown FancyBox for WordPress
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
wpscan.com
/vulnerability/4cda12f0-3c23-44ad-80ea-db2443ebcf82/
exploit, vdb-entry, technical-description, third-party-advisory
Sources
- CVE List CVE-2025-3662
- NVD CVE-2025-3662
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.