CVE-2018-14421
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 · uneditedSeaCMS v6.61 allows Remote Code execution by placing PHP code in a movie picture address (aka v_pic) to /admin/admin_video.php (aka /backend/admin_video.php). The code is executed by visiting /details/index.php. This can also be exploited through CSRF.
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 confidenceSeaCMS v6.61 allows remote code execution via the v_pic (movie picture address) parameter in /admin/admin_video.php. An attacker can inject PHP code into this field which gets stored and later executed when /details/index.php renders the video details page. The vulnerability can be exploited via CSRF, enabling unauthenticated attackers to trick authenticated administrators into injecting malicious code.
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= 6.61CVSS 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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Confirm SeaCMS version is 6.61Locate the version file or admin login page footer that displays the SeaCMS version number. Common paths include /admin/login.php or a version.php file in the includes directory.Affected if The installed SeaCMS version is exactly 6.61
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Verify admin_video.php existsCheck if the file /admin/admin_video.php exists in the webroot. This file handles video management including the v_pic (picture address) field.Affected if The file /admin/admin_video.php is present and accessible
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Inspect database for v_pic field contentExamine the database table storing video information (typically containing fields like v_name, v_pic, etc.) and look for any stored PHP code patterns in the v_pic field such as '<?php', system(), exec(), or base64_decode().Affected if The v_pic field in the video database contains unescaped PHP code or suspicious payloads
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Check details page for unsanitized outputReview the source code of /details/index.php (or similar template file that renders video details) to determine if the v_pic value is output directly without sanitization functions like htmlspecialchars() or strip_tags().Affected if The details page renders the v_pic value without proper output encoding
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Verify CSRF protection on admin operationsInspect the admin_video.php form submission to determine if anti-CSRF tokens or referrer validation are implemented for the video creation/editing operations.Affected if No CSRF token validation exists on the admin video management form
A system is affected if it runs SeaCMS version 6.61 with the admin_video.php endpoint accessible and the v_pic field is rendered without sanitization on the details page.
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 strict input validation to sanitize the v_pic parameter and prevent PHP code injection. Additionally, add CSRF tokens to admin operations to prevent cross-site request forgery exploitation.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-14421 — 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-2018-14421 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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