CVE-2025-4391
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 · uneditedThe Echo RSS Feed Post Generator plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the echo_generate_featured_image() function in all versions up to, and including, 5.4.8.1. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
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 confidenceThe Echo RSS Feed Post Generator WordPress plugin contains an arbitrary file upload vulnerability in the echo_generate_featured_image() function. Due to missing file type validation, unauthenticated attackers can upload arbitrary files—including malicious PHP scripts—directly to the server, potentially achieving remote code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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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Verify the plugin is installedGo to WordPress admin > Plugins and look for 'Echo RSS Feed Post Generator' in the installed plugins list, or search the wp-content/plugins directory for a folder named 'rss-feed-post-generator' or similarAffected if The plugin appears in the installed plugins list regardless of activation status
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Check the installed versionIn WordPress admin > Plugins, find the Echo RSS Feed Post Generator plugin and read the version number displayed beneath the plugin name, or open the main plugin PHP file and look for the 'Version' header in the plugin commentsAffected if Any version is potentially vulnerable since no fixed version is specified in the provided data
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Confirm the vulnerable function existsInspect the plugin source code, specifically looking for a function named 'echo_generate_featured_image' in the main plugin file or related include filesAffected if The function exists in the plugin code without proper file type validation checks (look for absence of mime-type or extension validation before file operations)
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Check upload directory accessibilityExamine the plugin settings or code to identify the upload directory path (typically wp-content/uploads or a plugin-specific folder), then verify if the web server has write permissions to that directoryAffected if The upload directory is writable by the web server process
You are affected if the Echo RSS Feed Post Generator plugin is installed and active on your WordPress site, as the vulnerability allows unauthenticated attackers to upload arbitrary files through the echo_generate_featured_image function without proper file type 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 dataUpdate the plugin to the latest version immediately. If no patched version is available, deactivate and remove the plugin until a fix is released.
- Consultation2.0 h
- Implementation1.0 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 $2,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-4391 — 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-2025-4391 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