CVE-2021-31848
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 · uneditedCross site scripting (XSS) vulnerability in McAfee Data Loss Prevention (DLP) ePO extension prior to 11.7.100 allows a remote attacker to highjack an active DLP ePO administrator session by convincing the logged in administrator to click on a carefully crafted link in the case management part of the DLP ePO extension.
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 confidenceReflected XSS vulnerability in the case management component of McAfee DLP ePO extension versions prior to 11.7.100 allows remote attackers to inject malicious JavaScript through crafted URLs. When a logged-in administrator clicks the malicious link, the injected script executes in their browser context, enabling session hijacking of the administrator's active DLP ePO session.
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>= 11.6.0, < 11.6.400>= 11.7.0, < 11.7.100CVSS 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 McAfee DLP ePO extension versionLocate the installed McAfee DLP ePO extension version in the ePO console under the extensions or agent policy settings, or check the extensions.xml file in the ePO installation directoryAffected if The installed version is 11.6.0 through 11.6.399, or 11.7.0 through 11.7.99 (any version below 11.6.400 or 11.7.100 within the stated ranges)
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Confirm case management component is enabledAccess the DLP ePO extension case management interface through the ePO console and verify it is accessible to administratorsAffected if The case management web component is enabled and accessible via the ePO interface
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Verify administrator web access to ePOConfirm that administrators have web-based access to the ePO console, as the reflected XSS requires an authenticated administrator sessionAffected if Administrative users can log into the ePO web interface and access the DLP case management module
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Review ePO server logs for suspicious URL patternsExamine ePO server logs (specifically case management related endpoints) for any anomalous URL parameters that may indicate exploitation attemptsAffected if Unusual or unexpected URL parameters are present in logs targeting the case management component
Your environment is affected if the McAfee DLP ePO extension version is 11.6.0 to 11.6.399 or 11.7.0 to 11.7.99 and administrators have web access to the case management component.
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.
dbcve · scoped11.6.40011.7.100
Upgrade McAfee DLP ePO extension to version 11.7.100 or later to remediate this vulnerability. As a compensating control, educate administrators to avoid clicking untrusted links and consider implementing Content Security Policy headers.
McAfee DLP Endpoint ePO extension version 11.7.100 (or later) - alternatively 11.6.400 for the 11.6.x branch
- 1. Identify the current McAfee DLP ePO extension version by navigating to the ePO server console and checking the DLP Endpoint component version
- 2. Review the official McAfee product release notes at kc.mcafee.com for version 11.7.100 (or 11.6.400 for the 11.6.x branch) to understand any specific upgrade requirements or注意事项
- 3. Create a full backup of the ePO server database and configuration before proceeding with the upgrade
- 4. Test the upgrade in a non-production ePO environment first to verify compatibility with existing infrastructure
- 5. Schedule a maintenance window as the upgrade will require restarting ePO services
- 6. Download the DLP ePO extension version 11.7.100 (or later) from the McAfee Product Downloads portal
- 7. Install the upgrade via the ePO console by navigating to Menu > Software > Extensions > Data Loss Prevention and importing the new version
- 8. Verify the upgrade was successful by confirming the DLP ePO extension version shows 11.7.100 or later in the ePO console
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-31848 — 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-2021-31848 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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- Version or environment caveats, and links to real fixes
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