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Vulnerabilities

Vulnerability · CVE-2026-6397

The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the shortcode attribute in versions up to and including 2.5.6.

Published May 20, 2026 · catalog updated Jul 24, 2026 · The Sticky plugin for

Check if you run it

No confirmed exploitation is on record for CVE-2026-6397. EPSS is 0.33%. Act only if a listed version of The Sticky plugin for is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The Sticky plugin for).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.33%
Remediation
Version ranges on file
Affected products
stated named in the record

The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the shortcode attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the function — the attribute value is passed through and directly concatenated into the HTML output without any escaping function such as . This makes it possible for authenticated attackers with Contributor-level access and above to inject arbitrary web scripts in pages that will execute whenever a user accesses a page containing the injected shortcode.

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.

  • stated named in the record<= 2.5.6

How to fix CVE-2026-6397

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-2026-6397. EPSS is 0.33%. Act only if a listed version of The Sticky plugin for is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 2.5.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.33%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

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

Timeline

Detection, updates, and resolution for this record.

  1. May 20, 2026 · NIST NVD

    Detected

    The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the shortcode attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the function — the attribute value is passed through and directly concatenated into the HTML output without any escaping function such as . This makes it possible for authenticated attac

  2. Jul 24, 2026 · NIST NVD

    Updated

    The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the shortcode attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the function — the attribute value is passed through and directly concatenated into the HTML output without any escaping function such as . This makes it possible for authenticated attac

Sources

  • CVE.orgVulnerability recordCVE-2026-6397

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-6397

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-6397

    The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the shortcode attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the func

    nvd.nist.gov

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.