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.
CVE-2021-21354
CVSS Score: 6.1 (MEDIUM)
EPSS Score: 0.18%
Risk Score: 4.27 (MEDIUM)
Risk Score based on CVSS score and EPSS. This score is for reference purposes and is not internationally recognized.
Mitre ATT&CK Technical v15.1
T1153 – Source
T1592.002 – Software
T1053.002 – At
Technical Analysis & Mitigation Measures
Reference Links
https://github.com/mozilla/PollBot/commit/6db74a4fcbff258c7cdf51a6ff0724fc10c485e5
https://github.com/mozilla/PollBot/pull/333
https://cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html
https://github.com/mozilla/PollBot/releases/tag/v1.4.4
https://bugzilla.mozilla.org/show_bug.cgi?id=1694684
https://github.com/mozilla/PollBot/security/advisories/GHSA-jhgx-wmq8-jc24
Vendor - Produce - Version
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