CVE-2025-52740
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 Hernan Villanueva Boldermail boldermail allows Object Injection.This issue affects Boldermail: from n/a through <= 2.4.0.
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 confidenceThe Boldermail plugin for WordPress through version 2.4.0 contains a PHP object injection vulnerability due to unsafe use of unserialize() on untrusted input. Attackers can craft malicious serialized PHP objects to potentially achieve remote code execution if magic methods exist in the application or loaded 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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Identify if Boldermail plugin is installedIn the WordPress admin dashboard, navigate to Plugins > Installed Plugins and locate the Boldermail entry to confirm it is active on your siteAffected if Boldermail plugin is present and active in WordPress
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Determine the installed Boldermail versionView the plugin details in the WordPress plugins page to read the currently installed version numberAffected if Version is 2.4.0 or any lower version number, indicating the plugin falls within the affected range
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Locate the vulnerable unserialize() call in plugin codeAccess the site files via FTP or file manager, navigate to wp-content/plugins/boldermail, and search PHP files for the pattern 'unserialize(' - examine the surrounding code to determine if untrusted input such as POST/GET parameters or database values are being passed to itAffected if Code contains an unserialize() call operating on data derived from user-supplied input without prior validation
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Assess presence of exploitable magic methodsSearch the boldermail plugin directory for magic method definitions including __destruct, __wakeup, __toString, __get, __set, or __invoke - also check other active plugins and the theme for these methods which could form a POP chainAffected if Any classes containing magic methods are loaded and accessible in the same PHP execution context as the vulnerable unserialize() call
You are affected if Boldermail version 2.4.0 or lower is installed AND the plugin code contains an unserialize() call operating on untrusted input, creating a potential PHP object injection vector.
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 Boldermail to the latest patched version. If no update is available, disable the plugin until a fix is released. Consider implementing input validation and replacing unserialize() with safer alternatives like json_decode().
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.
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Free · runs locallyCheck whether your project pulls in CVE-2025-52740 — 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-2025-52740 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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