What’s Vulnerable › Vulnerabilities

CVE-2021-38314: Gutenberg Template Library & Redux Framework <= 4.2.11 Sensitive Information Disclosure

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 29.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-02 · updated 2026-06-17
• Weakness: CWE-200

Description

The Gutenberg Template Library & Redux Framework plugin <= 4.2.11 for WordPress registered several AJAX actions available to unauthenticated users in the `includes` function in `redux-core/class-redux-core.php` that were unique to a given site but deterministic and predictable given that they were based on an md5 hash of the site URL with a known salt value of '-redux' and an md5 hash of the previous hash with a known salt value of '-support'. These AJAX actions could be used to retrieve a list of active plugins and their versions, the site's PHP version, and an unsalted md5 hash of site’s `AUTH_KEY` concatenated with the `SECURE_AUTH_KEY`.

Affected products

• Redux.io Gutenberg Template Library & Redux Framework: through 4.2.11

References

• https://www.wordfence.com/blog/2021/09/over-1-million-sites-affected-by-redux-framework-vulnerabilities/
• https://www.wordfence.com/blog/2021/09/over-1-million-sites-affected-by-redux-framework-vulnerabilities/

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