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Vulnerabilities

Vulnerability · CVE-2026-3643

The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3.

Published Apr 15, 2026 · catalog updated Jun 17, 2026 · The Accessibly plugin for

Check if you run it

No confirmed exploitation is on record for CVE-2026-3643. EPSS is 0.54%. Act only if a listed version of The Accessibly 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 Accessibly plugin for).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.54%
Remediation
Version ranges on file
Affected products
stated named in the record

The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3. The plugin registers REST API endpoints at and with the set to , which means no authentication or authorization check is performed. The function in accepts user-supplied JSON data and passes it directly to , which saves it to the WordPress options table via without any sanitization or validation. The stored value is later retrieved by and passed directly to as the script URL, causing it to be rendered as a tag on every front-end page. This makes it possible for unauthenticated attackers to inject arbitrary JavaScript that executes for all site visitors by changing the option to point to a malicious external script.

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<= 3.0.3

How to fix CVE-2026-3643

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-2026-3643. EPSS is 0.54%. Act only if a listed version of The Accessibly plugin for is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 3.0.3. 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 0.54%. 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. Apr 15, 2026 · NIST NVD

    Detected

    The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3. The plugin registers REST API endpoints at and with the set to , which means no authentication or authorization check is performed. The function in accepts user-supplied JSON data and passes it directly to , which saves it to the WordPress options table via

  2. Jun 17, 2026 · NIST NVD

    Updated

    The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3. The plugin registers REST API endpoints at and with the set to , which means no authentication or authorization check is performed. The function in accepts user-supplied JSON data and passes it directly to , which saves it to the WordPress options table via

Sources

  • CVE.orgVulnerability recordCVE-2026-3643

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3643

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-3643

    The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3. The plugin registers REST API endpoints at and with the `permission_cal

    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.