CVE-2025-49434
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 axiomthemes Cars4Rent cars4rent allows Object Injection.This issue affects Cars4Rent: from n/a through <= 1.4.2.
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 Cars4Rent WordPress theme by axiomthemes contains a PHP Object Injection vulnerability caused by deserialization of untrusted data. This allows remote attackers to inject malicious PHP objects, potentially leading to remote code execution through magic method invocation (e.g., __wakeup, __destruct). The vulnerability affects versions up to and including 1.4.2.
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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Confirm Cars4Rent theme installationNavigate to wp-content/themes/ and check if the cars4rent directory exists. In WordPress admin, go to Appearance > Themes to verify if the theme is active.Affected if The cars4rent theme directory exists in wp-content/themes/ and the theme is active or installed.
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Identify the installed versionOpen wp-content/themes/cars4rent/style.css and locate the 'Version:' header in the file comments. Alternatively, check the theme's functions.php for a version constant.Affected if The version number displayed is 1.4.2 or lower.
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Locate deserialization functions in theme filesSearch all PHP files in the cars4rent theme directory for 'unserialize(' patterns. Use grep or a file search: grep -r "unserialize" wp-content/themes/cars4rent/Affected if The theme contains any unserialize() calls that process data from external sources (request parameters, cookies, POST/GET input, or AJAX endpoints).
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Check for user input reaching deserializationExamine files containing unserialize() calls. Trace whether parameters from $_GET, $_POST, $_COOKIE, or file uploads are passed directly to unserialize() without validation.Affected if User-controlled data (from HTTP requests) is passed to unserialize() without sanitization or signature validation.
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Identify exposed endpoints accepting serialized dataReview AJAX handlers (admin-ajax.php hooks) and front-end form handlers within the theme. Check wp-content/themes/cars4rent/inc/ and includes/ directories for request processing files.Affected if The theme exposes any public or authenticated endpoints that accept and deserialize data from request parameters.
Your environment is affected if the Cars4Rent theme version is 1.4.2 or lower AND the theme 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 Cars4Rent theme to the latest patched version immediately. If no patched version is available, disable the theme and consider deploying a WAF rule to block serialized object payloads.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-49434 — 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-2025-49434 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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