CVE-2021-35499
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 Web Reporting component of TIBCO Software Inc.'s TIBCO Nimbus contains easily exploitable Stored Cross Site Scripting (XSS) vulnerabilities that allow a low privileged attacker to social engineer a legitimate user with network access to execute scripts targeting the affected system or the victim's local system. A successful attack using this vulnerability requires human interaction from a person other than the attacker. Affected releases are TIBCO Software Inc.'s TIBCO Nimbus: versions 10.4.0 and below.
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 confidenceTIBCO Nimbus Web Reporting component contains a stored Cross-Site Scripting (XSS) vulnerability where malicious scripts can be injected and persistently stored. A low-privileged attacker with network access can exploit this by social engineering a legitimate user to trigger the stored payload, potentially executing scripts against the affected system or the victim's local browser.
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<= 10.4.0CVSS 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
- 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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Identify installed TIBCO Nimbus versionCheck the Nimbus application version through the admin console, installation directory metadata, or product about information. Common locations: <Nimbus_install>/version.txt or within the Nimbus Control/Admin UI.Affected if The installed version is 10.4.0 or lower.
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Confirm Web Reporting component is enabledAccess Nimbus admin interface and navigate to the Web Reporting module configuration. Verify if the Web Reporting feature is active and accessible to users.Affected if Web Reporting component is enabled and accessible to low-privileged users.
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Inspect Web Reporting data storageExamine the database or file storage used by the Web Reporting component for any unexpected or suspicious content in report definitions, templates, or user-generated fields that could contain stored XSS payloads.Affected if Unexpected script tags, JavaScript code, or HTML elements are found stored in Web Reporting data fields.
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Review web access logs for XSS patternsAnalyze HTTP access logs from the Nimbus web server for unusual request patterns containing script tags, javascript: URIs, or other XSS vectors in Web Reporting input fields.Affected if Log entries show repeated XSS attack patterns being submitted to Web Reporting endpoints.
Your environment is affected if TIBCO Nimbus version is 10.4.0 or lower AND the Web Reporting component is enabled and accessible to users.
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 TIBCO Nimbus to a version above 10.4.0. Additionally, implement robust input validation and output encoding in the Web Reporting component to neutralize XSS vectors.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-35499 — 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-2021-35499 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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