Open Redirect in Mozilla Pollbot
CVE-2021-21354
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.014 (70.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Mozilla Pollbot — versions < 1.4.4
Weakness classification (CWE)
References
- github.com/mozilla/PollBot/security/advisories/GHSA-jhgx-wmq8-jc24 (Exploit, Third Party Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Third Party Advisory, Issue Tracking)
- cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat… (Third Party Advisory)
- github.com/mozilla/PollBot/releases/tag/v1.4.4 (Third Party Advisory)
- github.com/mozilla/PollBot/pull/333 (Patch, Third Party Advisory)
- github.com/mozilla/PollBot/commit/6db74a4fcbff258c7cdf51a6ff0724fc10c485e5 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21354?
- CVE-2021-21354 is a high-severity vulnerability in Mozilla Pollbot, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 7.4/10. Published 2021-03-08.
- How severe is CVE-2021-21354?
- High severity. CVSS v3 base score is 7.4 out of 10.