CVE-2017-5475
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 · uneditedcomment.php in Serendipity through 2.0.5 allows CSRF in deleting any comments.
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 confidencecomment.php in Serendipity through 2.0.5 lacks CSRF protection on the comment deletion functionality. An attacker can craft a malicious page that, when visited by an authenticated administrator, triggers the victim's browser to send a request to delete arbitrary comments without the victim's consent.
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<= 2.0.5CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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 Serendipity versionLocate the version file in your Serendipity installation (typically in the root directory or an includes folder) and note the version numberAffected if The installed version is 2.0.5 or lower
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Locate comment.phpFind the comment.php file within your Serendipity installation directory structureAffected if comment.php exists in the installation
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Verify comment deletion functionality existsOpen comment.php and search for the code handling comment deletion (look for delete-related functions or parameters)Affected if The file contains comment deletion logic without apparent token validation
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Inspect CSRF protection in deletion codeExamine the comment deletion code block in comment.php for CSRF token validation - check if a token is required, validated, or generated before allowing deletionAffected if No CSRF token check is present before executing the delete operation
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Check request method for deletionReview how the comment deletion request is made - determine if it uses GET instead of POSTAffected if The deletion action accepts GET requests without token validation
Your environment is affected if you run Serendipity version 2.0.5 or lower and the comment deletion code in comment.php lacks CSRF token validation.
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 CSRF token validation on comment deletion actions, requiring a valid token for each delete request. Additionally, consider requiring POST requests instead of GET for state-changing operations.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-5475 — 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-2017-5475 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
- No spam, self-promotion, credentials, or personal data