CVE-2025-39527
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 · uneditedDeserialization of Untrusted Data vulnerability in bestweblayout Rating by BestWebSoft rating-bws allows Object Injection.This issue affects Rating by BestWebSoft: from n/a through <= 1.7.
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 confidencePHP Object Injection vulnerability in the Rating by BestWebSoft WordPress plugin allows remote attackers to inject malicious PHP objects via unsafe deserialization of untrusted data. This can lead to Remote Code Execution (RCE) if suitable gadget chains exist in the application or associated libraries.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 Rating by BestWebSoft plugin is installedNavigate to WordPress admin > Plugins or inspect the /wp-content/plugins/rating-bws directory to confirm the plugin is presentAffected if The plugin directory /wp-content/plugins/rating-bws exists on the system
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Identify the installed plugin versionCheck the plugin main file (usually rating-bws.php) for the 'Version' header, or view the plugin details in the WordPress Plugins admin pageAffected if The version number displayed cannot be compared to any patched version because none was provided in the CVE advisory
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Search for unsafe deserialization calls in the plugin codeUse grep or a file search tool to locate 'unserialize' calls within the /wp-content/plugins/rating-bws directory, examining any PHP files that handle request parametersAffected if Files contain unserialize() calls that process $_GET, $_POST, $_REQUEST, or other user-supplied input without prior sanitization
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Verify the deserialization sink receives untrusted inputTrace the data flow from HTTP request parameters to the unserialize() call - check if raw or base64-encoded serialized data from user requests reaches the vulnerable functionAffected if User-controlled data from $_GET, $_POST, or $_REQUEST variables is passed directly to unserialize() without validation or sanitization
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Confirm the vulnerable code path is accessibleDetermine if the file containing the unsafe unserialize() is accessed directly or included via WordPress hooks that trigger on frontend or admin page loadsAffected if The PHP file containing the insecure deserialization is reachable via web requests without authentication requirements
You are affected if the Rating by BestWebSoft plugin is installed and the plugin code contains unserialize() calls that process untrusted user input from HTTP requests.
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 Rating by BestWebSoft plugin to the latest patched version. If no patched version is available, disable the plugin immediately and review server logs for indicators of exploitation.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-39527 — 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-2025-39527 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
- No spam, self-promotion, credentials, or personal data