CVE-2021-41871
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 · uneditedAn issue was discovered in Socomec REMOTE VIEW PRO 2.0.41.4. Improper validation of input into the username field makes it possible to place a stored XSS payload. This is executed if an administrator views the System Event Log.
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 confidenceA stored XSS vulnerability in Socomec REMOTE VIEW PRO 2.0.41.4 allows malicious JavaScript injection through the username field due to improper input validation. The injected payload persists in the system and executes when an administrator views the System Event Log.
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= 2.0.41.4CVSS 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 firmware versionAccess the device admin interface or check system information page to determine the exact firmware version of Socomec Remote View ProAffected if The installed version is exactly 2.0.41.4
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Locate username configuration fieldNavigate to the user management or profile settings section where the username is defined or editedAffected if A username field exists and accepts user-supplied input without visible sanitization indicators
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Verify System Event Log functionalityAccess the System Event Log or audit log viewer within the admin interfaceAffected if The System Event Log feature is accessible and displays historical user activity including usernames
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Confirm username persistenceSubmit a test username and verify it is stored and displayed in the System Event Log after creationAffected if Usernames entered in the username field are stored and rendered in the System Event Log without encoding
You are affected if the installed Socomec Remote View Pro firmware is exactly version 2.0.41.4 and usernames can be submitted through a field that subsequently appear in the System Event Log view.
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 dataImplement strict input validation and output encoding for all user-supplied fields, particularly the username field that feeds into the System Event Log. Additionally, deploy Content-Security-Policy headers to mitigate XSS execution.
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- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2021-41871 — 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-2021-41871 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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