{"cve":"CVE-2021-21354","nvd":{"published":"2021-03-08T19:15:13.333","modified":"2026-06-17T03:35:22.610","status":"Modified","description":"Pollbot is open source software which \"frees its human masters from the toilsome task of polling for the state of things during the Firefox release process.\" In Pollbot before version 1.4.4 there is an open redirection vulnerability in the path of \"https://pollbot.services.mozilla.com/\". An attacker can redirect anyone to malicious sites. To Reproduce type in this URL: \"https://pollbot.services.mozilla.com//evil.com/\". Affected versions will redirect to that website when you inject a payload like \"//evil.com/\". This is fixed in version 1.4.4.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-601"],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1694684","https://cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html","https://github.com/mozilla/PollBot/commit/6db74a4fcbff258c7cdf51a6ff0724fc10c485e5","https://github.com/mozilla/PollBot/pull/333","https://github.com/mozilla/PollBot/releases/tag/v1.4.4"],"products":["mozilla:pollbot"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2021-21354","score":0.01365,"percentile":0.7182,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}