Apache\Web server / proxy · Grichter
CVE-2025-40932
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 · uneditedApache::SessionX versions through 2.01 for Perl create insecure session id. Apache::SessionX generates session ids insecurely. The default session id generator in Apache::SessionX::Generate::MD5 returns a MD5 hash seeded with the built-in rand() function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Predicable session ids could allow an attacker to gain access to systems.
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 confidenceApache::SessionX versions through 2.01 generates session IDs using MD5 hashes seeded with the insecure built-in rand() function, epoch time, and PID. Since PID comes from a small set and epoch time may be leaked from HTTP headers, attackers can predict session IDs and hijack user sessions.
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
Apache\Web server / proxy
<= 2.01CVSS 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
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 if Apache::SessionX is installedRun 'perl -MApache::SessionX -e print $Apache::SessionX::VERSION' or check your Perl library path for Apache/SessionX.pmAffected if The module is present and version is 2.01 or lower
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Check the session ID generation module in useInspect your application code or Apache::SessionX configuration for 'Apache::SessionX::Generate::MD5' being used as the generation classAffected if The MD5 generator module is explicitly configured or loaded
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Verify session ID formatGenerate a few session IDs and examine their format - MD5 hashes are 32 hexadecimal charactersAffected if Session IDs appear as 32-char hex strings (MD5 format)
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Check for predictable ID patternsGenerate multiple session IDs in short succession and compare them for patterns related to time or sequential valuesAffected if Session IDs show predictable patterns or incrementing values tied to time/PID
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Audit session generation codeReview the Perl module file Apache/SessionX/Generate/MD5.pm if present in your environmentAffected if The code uses rand(), time(), or $$ (process ID) in the ID generation logic
You are affected if Apache::SessionX version 2.01 or lower is installed and the MD5-based session ID generator is in use, as this creates predictable session IDs from non-cryptographic sources.
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 dataReplace the default session ID generator in Apache::SessionX::Generate::MD5 with a cryptographically secure random number generator (e.g., using Crypt::Random or Bytes::Random::Secure) before deploying to production.
Fix this in Apache\
Scoped from the published advisory
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,464.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-40932 — 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-2025-40932 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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