CVE-2025-48101
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 webdevstudios Constant Contact for WordPress allows Object Injection. This issue affects Constant Contact for WordPress: from n/a through 4.1.1.
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 Constant Contact for WordPress plugin caused by insecure deserialization of untrusted data. Attackers can exploit this by passing malicious serialized PHP objects to vulnerable deserialization routines, potentially achieving remote code execution or other attacks.
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
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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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Locate the Constant Contact plugin installation directoryCheck for the presence of the plugin directory at wp-content/plugins/constant-contact-for-wordpress/ via file manager or FTP. Alternatively, log into the WordPress admin panel and navigate to Plugins > Installed Plugins to confirm the plugin is listed.Affected if The plugin directory or listing does not exist (plugin not installed, so not affected)
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Identify the installed plugin versionOpen the main plugin file (usually constant-contact-for-wordpress.php) in the plugin directory and read the 'Version' header in the plugin comment block. In WordPress admin, the version is displayed next to the plugin name in the Plugins list.Affected if Unable to determine version from plugin files or admin interface
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Compare the version against the fixed releaseCompare the installed version number to 4.1.2. Versions prior to 4.1.2 (such as 4.1.1, 4.1.0, 4.0.x, etc.) are considered affected. Versions 4.1.2 and later are not vulnerable.Affected if Installed version is below 4.1.2 (e.g., 4.1.1, 4.0.5, etc.)
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Verify the plugin is activeIn WordPress admin, check the Plugins list to confirm whether the Constant Contact plugin is activated. Alternatively, query the wp_options table for the active_plugins option.Affected if Plugin is installed with a vulnerable version but is not activated (lower risk but still vulnerable if activated later)
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Inspect for deserialization sinks in plugin codeSearch the plugin source files for uses of PHP unserialize() function. In the plugin directory, run: grep -r "unserialize" *.php or use a file search utility. Also check for any user-controlled input reaching these calls (e.g., from $_POST, $_GET, or $_COOKIE).Affected if The plugin code contains unserialize() calls that process input from unauthenticated user sources
The environment is affected if the Constant Contact for WordPress plugin is installed with a version lower than 4.1.2 and contains exploitable deserialization code, allowing potential PHP object injection.
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 Constant Contact for WordPress plugin to the latest patched version as soon as available. If no patch exists, disable the plugin until a fix is released.
- Consultation3.0 h
- Implementation6.0 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 $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-48101 — 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-2025-48101 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