JiraApplication · Atlassian
CVE-2019-20901
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe login.jsp resource in Jira before version 8.5.2, and from version 8.6.0 before version 8.6.1 allows remote attackers to redirect users to a different website which they may use as part of performing a phishing attack via an open redirect in the os_destination parameter.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceOpen redirect vulnerability in Atlassian Jira's login.jsp resource via the os_destination parameter allows remote unauthenticated attackers to craft malicious URLs that redirect authenticated users to attacker-controlled websites, facilitating phishing attacks.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
JiraApplication
< 8.5.2
Jira ServerApplication
= 8.6.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Jira installation versionAccess Jira's About page (typically at /secure/About.jspa) or check the footer of any Jira page for the version numberAffected if The displayed version is lower than 8.5.2, or exactly 8.6.0
-
Confirm Jira login endpoint accessibilityAccess the login page at /login.jsp and verify it loads successfullyAffected if The login page is accessible and responds to requests
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Test os_destination parameter behaviorSubmit a login request with os_destination set to an external domain (such as http://example.com) and observe if a redirect occursAffected if The application redirects to the external URL specified in os_destination without proper validation
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Compare version against vulnerability rangeDocument the exact Jira version from step 1 and compare against the affected ranges: versions below 8.5.2 or exactly version 8.6.0Affected if The installed version falls within the affected ranges (< 8.5.2 or = 8.6.0)
You are affected if your Jira version is below 8.5.2 or exactly 8.6.0 AND the login.jsp page is accessible with the os_destination parameter accepting unvalidated external URLs.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data8.5.2
Upgrade Jira to version 8.5.2 or 8.6.1 or later to patch the vulnerability; alternatively, implement URL validation to reject external/untrusted destinations in the os_destination parameter.
Fix this in Jira
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-20901 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2019-20901 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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