CVE-2021-21080
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 · uneditedAdobe Connect version 11.0.7 (and earlier) is affected by a reflected Cross-Site Scripting (XSS) vulnerability. An attacker could exploit this vulnerability to inject malicious JavaScript content that may be executed within the context of the victim's browser when they browse to the page containing the vulnerable field.
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 confidenceAdobe Connect versions 11.0.7 and earlier contain a reflected Cross-Site Scripting (XSS) vulnerability. Attackers can inject malicious JavaScript code into vulnerable web fields that executes within a victim's browser when they navigate to the affected page, allowing session hijacking, defacement, or redirection to malicious sites.
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<= 11.0.7CVSS 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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Determine Adobe Connect version via admin interfaceLog into the Adobe Connect Central admin console and navigate to the About or System Info section, or access /version.xml on the server to retrieve the installed version numberAffected if The reported version is 11.0.7 or earlier
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Check version via command line or logsIf available, inspect installation logs, the VERSION file in the install directory, or run version-checking commands provided by the Adobe Connect installerAffected if The installed version cannot be determined to be 11.0.8 or later
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Verify web interface accessibilityConfirm the Adobe Connect web application is accessible by navigating to the primary URL (typically port 80/443 or the configured port)Affected if The web interface is accessible and the version cannot be confirmed as 11.0.8 or later
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Identify exposed web parametersReview the Adobe Connect login page, meeting room URLs, and common input fields (such as login username, meeting room names, or query parameters) for reflected valuesAffected if User-supplied input is reflected in responses without visible output encoding, and the version is 11.0.7 or earlier
A user is affected if Adobe Connect is version 11.0.7 or earlier and the web interface is accessible, since the reflected XSS vulnerability exists in that version range.
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 Adobe Connect to version 11.0.8 or later. Alternatively, implement proper input validation and output encoding on the affected field(s) to neutralize malicious script injection.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-21080 — 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-2021-21080 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
- No spam, self-promotion, credentials, or personal data