CVE-2025-11906
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 · uneditedA vulnerability exists in Progress Flowmon versions prior 12.5.6 where certain system configuration files have incorrect file permissions, allowing a user with access to the default flowmon system user account used for SSH access to potentially escalate privileges to root during service initialization.
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 confidenceA privilege escalation vulnerability in Progress Flowmon versions before 12.5.6 allows users with SSH access to the default flowmon system account to modify system configuration files that have incorrect (overly permissive) file permissions. During service initialization, these files are read and executed with root privileges, enabling the attacker to gain root access.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Local
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:H/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 Flowmon installation and versionRun 'rpm -qa | grep -i flowmon' or 'dpkg -l | grep -i flowmon' to find installed Flowmon packages, then check the version against the affected range (versions before 12.5.6). If using a web interface, log in and navigate to Help > About to view the version.Affected if Flowmon version is present and is lower than 12.5.6
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Verify flowmon system account existsCheck for the 'flowmon' user account by running 'id flowmon' or looking in /etc/passwd with 'grep flowmon /etc/passwd'. Confirm SSH access is permitted by reviewing /etc/ssh/sshd_config for AllowUsers or AllowGroups containing flowmon.Affected if A 'flowmon' user account exists and is allowed SSH access
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Identify configuration files with permissive ownershipSearch for configuration files in common Flowmon directories (typically under /opt/flowmon, /etc/flowmon, or /var/opt/flowmon) that are owned by the flowmon user or group, or have world-writable permissions (permissions ending in 'o+w' or '777'). Use 'find /opt/flowmon -user flowmon -o -group flowmon -o -perm -002 2>/dev/null' as a starting point.Affected if Configuration files are owned by or writable by the flowmon user account
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Check if root-owned processes read flowmon-writable filesReview the Flowmon service configuration (systemd service file or init script) to identify which processes run as root. Examine the service startup scripts to determine which configuration files they read during initialization. Cross-reference that these files are writable by the flowmon user.Affected if A root-owned service process reads and executes configuration files that the flowmon user can modify
You are affected if Flowmon version is below 12.5.6, a flowmon user account with SSH access exists, and configuration files writable by that user are read by root-owned services during initialization.
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 · scopedUpgrade to Flowmon version 12.5.6 or later which contains the corrected file permissions. As a compensating control, audit and restrict permissions on system configuration files to follow least-privilege principles.
12.5.6
- Back up all Flowmon configuration files and databases before upgrading
- Upgrade Progress Flowmon to version 12.5.6 or later
- After upgrade, verify that system configuration files have correct permissions (should not be world-writable or group-writable by the flowmon user)
- Restart the Flowmon services and verify normal operation
- Confirm the flowmon user cannot escalate to root via the previously vulnerable file permissions
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation4.0 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-2025-11906 — 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-2025-11906 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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