CVE-2020-35851
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 · uneditedHGiga MailSherlock does not validate specific parameters properly. Attackers can use the vulnerability to launch Command inject attacks remotely and execute arbitrary commands of the system.
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 confidenceHGiga MailSherlock fails to properly validate specific parameters, allowing remote attackers to inject and execute arbitrary system commands through the vulnerable input fields. This command injection vulnerability stems from insufficient input sanitization in the application's parameter handling.
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< 4.5-115< 4.5-115CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 if HGiga MailSherlock is installedLocate the MailSherlock installation directory or check system services for 'MailSherlock', 'Msr45', or 'Ssr45' processesAffected if The software is installed on the system
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Determine installed versionCheck the application version through its web interface, About page, or version file in the installation directoryAffected if The version is lower than 4.5-115 (e.g., 4.5-100, 4.4.x, etc.)
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Verify the web parameter handling module is accessibleAccess the MailSherlock web administration interface and navigate to the parameter input fields used for email processing or user managementAffected if The web interface and parameter input fields are accessible without additional authentication or the authentication is bypassed
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Inspect application logs for suspicious command executionReview MailSherlock application logs for entries containing unusual system commands, shell metacharacters (|, ;, &, $), or unexpected command patternsAffected if Logs show command injection attempts or successful unauthorized command execution
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Check for unauthorized system accessExamine system process lists and network connections originating from the MailSherlock service account for unexpected commands or outbound connectionsAffected if Unfamiliar processes or network activity originated from the MailSherlock service
You are affected if HGiga MailSherlock (Msr45 or Ssr45) is installed with a version lower than 4.5-115 and the web parameter handling interface is accessible.
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 · scoped4.5-115
Implement strict whitelist-based input validation for all user-supplied parameters and replace any unsafe system command execution functions with parameterized alternatives or safe APIs that do not invoke shell interpreters.
HGiga MailSherlock version 4.5-115 or later
- 1. Identify all deployed instances of HGiga MailSherlock (Msr45/Ssr45 Isherlock User) in your environment
- 2. Check the current version of each installed instance
- 3. If the version is below 4.5-115, download the updated version 4.5-115 or later from the official vendor
- 4. Review release notes for any security improvements or changes
- 5. Schedule a maintenance window for the upgrade
- 6. Back up the current configuration and data
- 7. Upgrade the software to version 4.5-115 or later
- 8. Verify the upgrade was successful by checking the version number
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $12,352.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-35851 — 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-2020-35851 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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