CVE-2021-22157
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 · uneditedProofpoint Insider Threat Management Server (formerly ObserveIT Server) before 7.11.1 allows stored XSS.
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 · moderate confidenceThe Proofpoint Insider Threat Management Server (formerly ObserveIT) before version 7.11.1 contains a stored cross-site scripting (XSS) vulnerability. This allows an attacker to inject malicious scripts that are persistently stored on the server and executed when other users access the affected functionality.
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>= 7.9.0, < 7.9.3>= 7.10.0, < 7.10.3>= 7.11.0, < 7.11.1CVSS 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 the installed version of Proofpoint Insider Threat Management ServerAccess the product's administrative interface or system information to locate the installed version number. This is typically found in the About section, system settings, or version information within the product.Affected if Unable to retrieve or confirm the installed version number
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Compare the version against the affected rangesVerify whether your installed version falls within any of these vulnerable ranges: 7.9.0 through 7.9.2, 7.10.0 through 7.10.2, or 7.11.0. These correspond to the versions before the patches in each release branch.Affected if Installed version is 7.9.0 to 7.9.2, OR 7.10.0 to 7.10.2, OR 7.11.0
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Confirm the specific patch levelIdentify the exact minor version number to determine if the patch has been applied. Versions 7.9.3, 7.10.3, and 7.11.1 contain the fix and are not affected.Affected if The version is less than 7.9.3 in the 7.9.x branch, less than 7.10.3 in the 7.10.x branch, or less than 7.11.1 in the 7.11.x branch
The environment is affected if the installed version is any release from 7.9.0 up to but not including 7.9.3, 7.10.0 up to but not including 7.10.3, or 7.11.0 up to but not including 7.11.1.
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 data7.9.37.10.37.11.1
Upgrade the Insider Threat Management Server to version 7.11.1 or later to address the stored XSS vulnerability.
- Consultation2.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22157 — 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-2021-22157 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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