CVE-2025-22927
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 in OS4ED openSIS v8.0 through v9.1 allows attackers to execute a directory traversal by sending a crafted POST request to /Modules.php?modname=messaging/Inbox.php&modfunc=save&filename.
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 directory traversal vulnerability in OS4ED openSIS versions 8.0 through 9.1 allows remote attackers to access arbitrary files on the server by sending crafted POST requests with path traversal sequences (e.g., ../../) in the filename parameter to /Modules.php?modname=messaging/Inbox.php&modfunc=save&filename.
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>= 8.0, <= 9.1CVSS 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
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 openSIS installation and versionLocate the openSIS installation directory and check version.php or similar version file within the application root. Compare the found version against the affected range 8.0 through 9.1.Affected if The installed openSIS version is 8.0, 8.x, 9.0, or 9.1.
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Verify messaging module is accessibleConfirm that the /Modules.php endpoint exists and responds to requests. Check if the messaging module is enabled in the openSIS admin panel or configuration.Affected if The messaging module (modname=messaging/Inbox.php) is enabled and the Modules.php endpoint is accessible.
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Check if save function accepts filename parameterSend a benign POST request to /Modules.php?modname=messaging/Inbox.php&modfunc=save with a test filename parameter containing a path traversal sequence (e.g., filename=../../test). Inspect whether the application accepts and processes this parameter without rejecting the traversal characters.Affected if The filename parameter in the save function accepts path traversal sequences without validation.
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Confirm web server configuration allows direct accessVerify that the web server (Apache/Nginx/IIS) has not restricted access to the Modules.php file or applied additional access controls that would prevent external requests to the vulnerable endpoint.Affected if The /Modules.php?modname=messaging/Inbox.php&modfunc=save endpoint is directly reachable from the network without additional authentication barriers.
A system is affected if it runs openSIS version 8.0 through 9.1 with the messaging module enabled and the vulnerable /Modules.php endpoint exposed, where the filename parameter permits path traversal sequences.
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 path canonicalization on the filename parameter to reject path traversal sequences, and ensure all file operations are restricted to intended safe directories.
- Consultation2.0 h
- Implementation6.0 h
- Testing3.0 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 $3,664.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-22927 — 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-2025-22927 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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