CVE-2020-4104
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 · uneditedHCL BigFix WebUI is vulnerable to stored cross-site scripting (XSS) within the Apps->Software module. An attacker can use XSS to send a malicious script to an unsuspecting user. This affects all versions prior to latest releases as specified in https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0080855&sys_kb_id=971d99ed1b8ed01c086dcbfc0a4bcb6a.
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 confidenceStored cross-site scripting (XSS) vulnerability in HCL BigFix WebUI's Apps->Software module allows attackers to inject malicious scripts that persist and execute when users access the affected functionality. The attacker targets unsuspecting users by embedding malicious JavaScript into data fields within the Software module.
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 dataall versionsCVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/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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Confirm HCL BigFix WebUI installationLocate the WebUI installation directory or check the BigFix console for WebUI components under the Web Reports or WebUI sectionAffected if HCL BigFix WebUI is installed and running
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Verify Apps->Software module is accessibleLog into HCL BigFix WebUI and navigate to Apps menu > Software module, or check the navigation configuration files for the Software module routeAffected if The Software module is present and accessible in the WebUI interface
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Inspect Software module data fields for script contentAccess the Software module interface and review any software entries, or query the underlying database/Backups for the Software module content tables looking for script tags like <script>, javascript:, or on* event handlers in name/version/description fieldsAffected if Any Software module entry contains HTML script tags or JavaScript code in data fields
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Review user access controls to Software moduleCheck the WebUI user roles and permissions configuration to determine which users have write access to the Software moduleAffected if Non-administrative or untrusted users have create/edit permissions on the Software module
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Examine WebUI logs for injection attemptsSearch WebUI server logs for suspicious patterns in Software module data submissions, such as encoded scripts, script tags, or unusual character sequences in software entry fieldsAffected if Logs show recent injection attempts or unusual script-like content in Software module submissions
A user is affected if HCL BigFix WebUI is installed with the Apps->Software module accessible and either malicious script content exists in Software module entries or the module lacks proper access controls.
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 dataUpgrade HCL BigFix WebUI to the latest patched version as specified in HCL support article KB0080855. Until then, restrict administrative access to the Software module and monitor for suspicious script injection attempts.
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-4104 — 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-2020-4104 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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