Add Custom CSS and JS <= 1.20 - Stored XSS via CSRF
Priority MEDIUM 64CWE-352Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-352.
Summary
The Add Custom CSS and JS WordPress plugin through 1.20 does not have CSRF check in some places, and is missing sanitisation as well as escaping, which could allow attackers to make logged in as author and above add Stored XSS payloads via a CSRF attack
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00212 11th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Add Custom CSS and JS | up to 1.20 | — | No fix listed | CNA |
- Add Custom CSS and JS VendorUnknown Affected up to 1.20 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:technologicx:add_custom_css_and_js:*:*:*:*:*:wordpress:*:* | up to 1.20 | Vulnerable | Technologicx |
- cpe:2.3:a:technologicx:add_custom_css_and_js:*:*:*:*:*:wordpress:*:* Versions up to 1.20 Vulnerable ·Technologicx
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-3903
- 2026-10-03 Alias added: GHSA-c8wr-mrmh-hrhr
References
Sources
- CVE-2024-3903 · CVE Program
- CVE-2024-3903 · NVD
- FIRST EPSS
- GHSA-c8wr-mrmh-hrhr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences