How severe is CVE-2021-36851?

CVE-2021-36851 has a CVSS 3.x base score of 4.1, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-36851 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36851?

CVE-2021-36851 affects Web-settler Testimonial Slider. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36851?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-36851 published?

CVE-2021-36851 was published on 2022-04-04 and last updated on 2026-06-17.

CVE-2021-36851

CVE-2021-36851 is a medium-severity vulnerability in Web-settler Testimonial Slider with a CVSS 3.x base score of 4.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.1)
CVSS v2: 3.5
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Web-settler Testimonial Slider
Published: 2022-04-04
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-36851?: 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.
How severe is CVE-2021-36851?: CVE-2021-36851 has a CVSS 3.x base score of 4.1, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-36851 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36851?: CVE-2021-36851 affects Web-settler Testimonial Slider. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36851 published?: CVE-2021-36851 was published on 2022-04-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:web-settler:testimonial_slider:*:*:*:*:*:wordpress:*:*

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