CVE-2025-52725
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 pebas CouponXxL couponxxl allows Object Injection.This issue affects CouponXxL: from n/a through <= 3.0.0.
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 confidenceThis is a PHP Object Injection vulnerability in the CouponXxL WordPress plugin. The application deserializes untrusted data (likely via PHP's unsafe unserialize() function), allowing attackers to inject arbitrary PHP objects. When suitable 'gadget chains' exist in the application or its dependencies, this can lead to 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.
-
Verify CouponXxL plugin is installedNavigate to WordPress admin > Plugins and check if CouponXxL is listed as installed and active, or inspect the wp-content/plugins directory for a couponxxl folderAffected if The plugin is present and active in the WordPress installation
-
Determine installed plugin versionOpen the main plugin file (typically couponxxl.php or index.php in wp-content/plugins/couponxxl/) and locate the Version header in the plugin comment blockAffected if No version is listed or the version is unknown (making comparison to vulnerable versions impossible)
-
Search for unsafe unserialize() callsUse grep or a file search to scan plugin PHP files for 'unserialize(' patterns, particularly those processing user-supplied data from $_GET, $_POST, or $_REQUESTAffected if The plugin code contains unserialize() calls that handle external input
-
Identify if deserialization accepts user inputExamine the code context around any unserialize() calls found - trace whether $_GET, $_POST, $_REQUEST, or similar superglobals flow into the unserialize() functionAffected if Untrusted data from HTTP requests can reach the unserialize() function
If CouponXxL is installed and its code contains unserialize() calls that process user input without sanitization, the environment is affected by this PHP Object Injection vulnerability.
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 dataReplace any usage of unserialize() with safer alternatives like json_decode() for data from user input, or implement a strict allowlist of allowed classes if serialization is truly required. Audit for existing pop chains that could enable RCE.
- Consultation4.0 h
- Implementation4.0 h
- Testing4.0 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 $3,968.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-52725 — 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-2025-52725 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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