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Vulnerabilities

Vulnerability · CVE-2025-39421

Cross-Site Request Forgery (CSRF) vulnerability in Mustafa KUCUK WP Sticky Side Buttons wp-sticky-side-buttons allows Stored XSS.This issue affects WP Sticky Side Buttons: from n/a

Published Apr 17, 2025 · catalog updated Apr 28, 2026 · Mustafa KUCUK WP Sticky Side Buttons

Check if you run it

No confirmed exploitation is on record for CVE-2025-39421. EPSS is 0.15%. Act only if a listed version of Mustafa KUCUK WP Sticky Side Buttons is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.15%
Remediation
Advisory link
Affected products
vendor Mustafa KUCUK WP Sticky Side Buttons 0 ≤2.1

Cross-Site Request Forgery (CSRF) vulnerability in Mustafa KUCUK WP Sticky Side Buttons wp-sticky-side-buttons allows Stored XSS.This issue affects WP Sticky Side Buttons: from n/a through <= 2.1.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Mustafa KUCUK WP Sticky Side Buttons 0 ≤2.10 ≤2.1

How to fix CVE-2025-39421

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-39421. EPSS is 0.15%. Act only if a listed version of Mustafa KUCUK WP Sticky Side Buttons is installed.

Which versions are affected?

Compare what you have installed with Mustafa KUCUK WP Sticky Side Buttons 0 ≤2.1 0 ≤2.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.15%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 17, 2025 · EUVD

    Detected

    Cross-Site Request Forgery (CSRF) vulnerability in Mustafa KUCUK WP Sticky Side Buttons wp-sticky-side-buttons allows Stored XSS.This issue affects WP Sticky Side Buttons: from n/a through <= 2.1.

  2. Apr 28, 2026 · EUVD

    Updated

    Cross-Site Request Forgery (CSRF) vulnerability in Mustafa KUCUK WP Sticky Side Buttons wp-sticky-side-buttons allows Stored XSS.This issue affects WP Sticky Side Buttons: from n/a through <= 2.1.

Sources

  • CVE.orgVulnerability recordCVE-2025-39421

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-39421

    30-day exploitation probability 0.1%

    first.org
  • EUVDVulnerability recordEUVD-2025-11567

    Cross-Site Request Forgery (CSRF) vulnerability in Mustafa KUCUK WP Sticky Side Buttons wp-sticky-side-buttons allows Stored XSS.This issue affects WP Sticky Side Buttons: from n/a through <= 2.1.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.