CVE-2018-11734
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 · uneditedIn e107 v2.1.7, output without filtering results in XSS.
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 confidencee107 v2.1.7 contains a Cross-Site Scripting (XSS) vulnerability where output is rendered without proper sanitization, allowing attackers to inject malicious scripts into web pages that execute in other users' browsers.
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= 2.1.7CVSS 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.
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Confirm e107 installationLocate the e107 installation directory and check for version file (e.g., e107_handlers/version.php or admin header) or access /e107_admin/admin.php to view version infoAffected if e107 version is 2.1.7 exactly (or if version cannot be determined but the application is confirmed as e107 v2.1.7)
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Identify user input reflection pointsReview web pages that accept user input (forms, search fields, comment sections, user profile fields) and inspect the page source using browser developer tools to see if input values appear in the HTML outputAffected if User-supplied data appears in the rendered HTML without visible encoding (e.g., < becomes <, > becomes >)
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Test for reflected XSS vulnerabilitySubmit a harmless test payload like <script>alert('XSS')</script> or <img src=x onerror=alert('XSS')> in input fields and check if the script tag renders as literal text or executesAffected if The test payload executes as JavaScript (triggers alert) or renders as raw HTML without being entity-encoded
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Inspect source code for output encodingIf source code access is available, search for echo or print statements that output $_GET, $_POST, or database values without functions like htmlspecialchars(), htmlentities(), or e107's sanitization methodsAffected if User-supplied data is being output directly without encoding functions applied
You are affected if you are running e107 version 2.1.7 and user-supplied input is rendered in web pages without HTML entity encoding (the test XSS payload executes or displays as raw HTML).
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 dataApply proper output encoding/escaping (HTML entity encoding) to all user-supplied data before rendering in web pages. Implement context-aware output encoding based on where the data is being displayed.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-11734 — 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-2018-11734 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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