CVE-2018-16779
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 · uneditedBlogCMS through 2016-10-25 has XSS via a comment.
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 confidenceBlogCMS through version 2016-10-25 contains a Cross-Site Scripting (XSS) vulnerability in its comment functionality. User-supplied input within comments is not properly sanitized or escaped, allowing injection of malicious HTML/JavaScript that executes 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<= 2016-10-25CVSS 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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Identify BlogCMS installationCheck your web server for BlogCMS files (look for directories named 'blogcms', 'blog', or similar CMS structures). If accessible via web, examine the login page or homepage footer for 'BlogCMS' branding.Affected if BlogCMS is present on the server
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Determine BlogCMS versionLocate the version file or check the source code for a version definition (often in a config file, README, or meta tag). Compare the found version date to '2016-10-25'.Affected if The installed version is dated 2016-10-25 or earlier
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Verify comment functionality is enabledAccess the blog's comment submission form on blog posts. Check the admin panel or configuration files for comment-related settings (look for 'comments', 'enable_comments', or similar flags).Affected if Comment functionality is active and accessible to users
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Inspect comment input handlingExamine the code handling comment submission (typically in PHP files handling form posts). Look for sanitization functions like htmlspecialchars, strip_tags, or sanitization libraries on the comment input before storage or display.Affected if No sanitization/escaping functions are applied to comment input before rendering
A user is affected if BlogCMS version 2016-10-25 or earlier is installed and the comment feature is enabled, with comments rendered without proper HTML/script 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 proper input validation and output encoding on all comment fields. Use a vetted sanitization library to neutralize HTML/script tags before rendering comments in the browser.
- Consultation2.0 h
- Implementation4.0 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 $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-16779 — 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-2018-16779 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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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