{"id":"CVE-2021-21337","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-21337","generatedAt":"2026-10-27T22:33:59.384Z","title":"In Products.PluggableAuthService before version 2.6.0 there is an open redirect vulnerability.","description":"Products.PluggableAuthService is a pluggable Zope authentication and authorization framework. In Products.PluggableAuthService before version 2.6.0 there is an open redirect vulnerability. A maliciously crafted link to the login form and login functionality could redirect the browser to a different website. The problem has been fixed in version 2.6.1. Depending on how you have installed Products.PluggableAuthService, you should change the buildout version pin to `2.6.1` and re-run the buildout, or if you used `pip` simply do `pip install \"Products.PluggableAuthService>=2.6.1\".","published":"2021-03-08T21:15:17.000Z","lastModified":"2026-06-17T03:35:20.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-601"],"affected":["zope/products.pluggableauthservice"],"epss":{"score":0.08443,"percentile":0.94969,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2021-06-02","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":49930,"kind":"exploit","title":"Products.PluggableAuthService 2.6.0 - Open Redirect","url":"https://www.exploit-db.com/exploits/49930","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/python/webapps/49930.txt","file":"exploits/python/webapps/49930.txt","published":"2021-06-02","added":"2021-06-02","updated":"2021-06-02","author":"Piyush Patil","type":"webapps","platform":"python","port":null,"verified":false,"codes":["CVE-2021-21337"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comProducts.PluggableAuthService-2.6.0.zip","screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"high","text":"A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 8.4%. Treat it as high on anything reachable from the internet."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/162911/Products.PluggableAuthService-2.6.0-Open-Redirect.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"security-advisories@github.com"},{"url":"https://github.com/zopefoundation/Products.PluggableAuthService/commit/7eead067898852ebd3e0f143bc51295928528dfa","tags":["Patch","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p44j-xrqg-4xrr","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://pypi.org/project/Products.PluggableAuthService/","tags":["Product","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"http://packetstormsecurity.com/files/162911/Products.PluggableAuthService-2.6.0-Open-Redirect.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/zopefoundation/Products.PluggableAuthService/commit/7eead067898852ebd3e0f143bc51295928528dfa","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p44j-xrqg-4xrr","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://pypi.org/project/Products.PluggableAuthService/","tags":["Product","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-21337","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}