WordPress Testimonial Slider plugin <= 3.5.8.3 - Cross-Site Scripting (XSS) vulnerability
Priority LOW 25CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
Authenticated (editor or higher user role) Cross-Site Scripting (XSS) vulnerability in Web-Settler Testimonial Slider – Free Testimonials Slider Plugin (WordPress plugin) via parameters mpsp_posts_bg_color, mpsp_posts_description_color, mpsp_slide_nav_button_color.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00566 47th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- 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 |
|---|---|---|---|---|---|
| Web-Settler | Testimonial Slider – Free Testimonials Slider Plugin (WordPress plugin) | <= 3.5.8.3 – 3.5.8.3 | — | No fix listed | CNA |
- Testimonial Slider – Free Testimonials Slider Plugin (WordPress plugin) VendorWeb-Settler Affected <= 3.5.8.3 – 3.5.8.3 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:web-settler:testimonial_slider:*:*:*:*:*:wordpress:*:* | up to 3.5.8.3 | Vulnerable | Web-Settler |
- cpe:2.3:a:web-settler:testimonial_slider:*:*:*:*:*:wordpress:*:* Versions up to 3.5.8.3 Vulnerable ·Web-Settler
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36851
- 2026-10-03 Alias added: GHSA-rjq3-c2jr-r9rq
References
Sources
- CVE-2021-36851 · CVE Program
- CVE-2021-36851 · NVD
- FIRST EPSS
- GHSA-rjq3-c2jr-r9rq · 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