CVE-2017-17734
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 · uneditedCMS Made Simple (CMSMS) before 2.2.5 does not properly cache login information in sessions.
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 confidenceThe vulnerability in CMS Made Simple versions before 2.2.5 relates to improper session caching of login information, potentially allowing authentication bypass or session hijacking. The exact technical mechanism is not detailed in the available description, but the high CVSS score suggests the caching flaw could expose or mishandle sensitive authentication credentials stored in server-side 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< 2.2.5CVSS 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:3.0/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 installed CMS Made Simple versionLocate the version file in your CMS Made Simple installation (typically in the admin panel under About or in a version/config file within the installation directory) and note the version numberAffected if The installed version is any version prior to 2.2.5 (e.g., 2.2.4, 2.2.3, 2.2.0, 1.x series)
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Verify PHP session handling is activeCheck that PHP sessions are enabled on the web server hosting CMS Made Simple by reviewing php.ini for session support or checking the PHP info pageAffected if PHP sessions are enabled and the CMS is using server-side session caching for authentication data
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Examine session storage configurationReview the session.save_path and session.save_handler configuration in PHP settings to understand where session data is storedAffected if Sessions are stored in a location accessible to the web server and readable by other processes
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Inspect session cache behaviorMonitor or log session data during login and subsequent requests to observe if authentication credentials are being cached inappropriately in session storageAffected if Session data contains plaintext or improperly handled authentication tokens that persist beyond the login session
You are affected if your CMS Made Simple installation version is below 2.2.5 and the application uses session caching that stores or caches login credentials in a way that could be accessed or hijacked.
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 · scoped2.2.5
Upgrade CMS Made Simple to version 2.2.5 or later to remediate the session caching vulnerability. Verify all session handling and authentication workflows post-upgrade.
CMS Made Simple 2.2.5 or latest stable release
- 1. Create a complete backup of the CMS Made Simple database and all website files
- 2. Download CMS Made Simple version 2.2.5 or later from the official website (www.cmsmadesimple.org)
- 3. Follow the official upgrade instructions provided in the CMS Made Simple documentation
- 4. After upgrading, verify that user sessions are being properly managed and cached
- 5. Test login functionality to confirm the information exposure vulnerability is resolved
- 6. Review the admin panel to ensure no unexpected changes or unauthorized access occurred
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-17734 — 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-2017-17734 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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