CVE-2018-0537
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 · uneditedCross-site scripting vulnerability in QQQ SYSTEMS ver2.24 allows an attacker to inject arbitrary web script or HTML via quiz_op.cgi.
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 confidenceStored cross-site scripting (XSS) vulnerability in QQQ SYSTEMS version 2.24 allows remote attackers to inject arbitrary JavaScript or HTML payloads via the quiz_op.cgi script, which are then executed in the context of other users' browsers when the malicious content is rendered.
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= 2.24CVSS 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
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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.
-
Identify QQQ Systems installation versionCheck the application documentation, version file, or headers returned by the web server to determine the installed version of QQQ Systems. Compare against the affected version 2.24.Affected if The installed version is exactly 2.24 (note: the affected version is specified as = 2.24, meaning only this exact version)
-
Locate quiz_op.cgi scriptSearch the web server document root for the quiz_op.cgi script. This is the affected component that handles quiz operations.Affected if The quiz_op.cgi script exists and is accessible via the web server
-
Verify user input processing in quiz_op.cgiExamine the quiz_op.cgi script source code to confirm it accepts and processes user-supplied input that gets stored in the application database or file system.Affected if The script accepts user input without sufficient sanitization and stores it for later retrieval
-
Check for stored content renderingReview how the application displays stored quiz data back to users. Look for areas where user-provided content (quiz questions, answers, or metadata) is rendered in HTML without proper encoding.Affected if Stored content from quiz_op.cgi is rendered to other users without context-aware output encoding
A user is affected if they are running QQQ Systems version 2.24 and the quiz_op.cgi script processes and stores user input that is later displayed to other users without proper sanitization.
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 input validation and context-aware output encoding for all user-supplied data in quiz_op.cgi to neutralize malicious script injection. Consider implementing Content Security Policy headers as defense-in-depth.
- Consultation3.0 h
- Implementation4.0 h
- Testing2.0 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 $3,168.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-0537 — 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-2018-0537 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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