medium CVSS 5.6 EPSS 0.43%

CVE-2025-2939·PHP vulnerability

The Ninja Tables – Easy Data Table Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 5.0.18 via deserialization of untrusted input from the args[callback] parameter . This makes it possible for unauthenticated attackers to inject a PHP Object. The additional presence of a POP chain allows attackers to execute arbitrary functions, though it does not allow user supplied parameters only single functions can be called so the impact is limited.

Severity
medium
Software
PHP
Fixed in
5.0.19
Published

How likely is exploitation

FIRST's Exploit Prediction Scoring System puts the probability of this CVE being exploited in the next 30 days at 0.43% — higher than 35% of all published CVEs. EPSS is an independent forecast of exploitation, not a severity rating: it says nothing about how much damage a successful attack does, which is what a CVSS score measures.

Affected versions

Until: 5.0.19

Fixed in: 5.0.19

How to fix this CVE

Update the Ninja Tables WordPress plugin to version 5.0.19 or later to patch the PHP Object Injection vulnerability in the args[callback] parameter. This vulnerability allows unauthenticated attackers to inject malicious PHP objects that can execute arbitrary functions through a gadget chain. Immediately apply this update on all WordPress installations using Ninja Tables to prevent potential remote code execution.

sudo dnf update php

Defensia detects this vulnerability

What an exploitation attempt looks like

Sample log line indicative of exploitation attempts:

POST requests to /wp-admin/admin-ajax.php containing serialized PHP object patterns (e.g., strings starting with 'O:' or 'C:') in the args[callback] parameter; monitor for requests with class instantiation patterns targeting known WordPress gadget chains

WAF mitigation (if patching is not yet possible)

Add this rule to your WAF to block exploitation attempts while you schedule the patch. 

Implement a WAF rule to block POST requests to WordPress admin-ajax endpoints containing PHP serialized object indicators (regex: /O:\d+:|C:\d+:/i in request body), and specifically filter requests where the 'callback' parameter contains object serialization syntax

How to check if you are affected

  1. Check the Ninja Tables plugin version by navigating to WordPress Admin > Plugins and locating 'Ninja Tables'; compare against version 5.0.19
  2. Examine the plugin file at /wp-content/plugins/ninja-tables/vendor/wpfluent/framework/src/WPFluent/Http/Client.php to verify if unserialization of the args[callback] parameter is properly sanitized
  3. Search web server logs (Apache/Nginx access logs) for POST requests containing serialized PHP objects or suspicious 'callback' parameters in query strings
  4. Verify the plugin is running 5.0.19 or later by checking wp-content/plugins/ninja-tables/readme.txt or the plugin version declaration in the main plugin file

FAQ

What is CVE-2025-2939?

CVE-2025-2939 is a PHP Object Injection vulnerability in the Ninja Tables WordPress plugin that allows unauthenticated attackers to deserialize untrusted input through the args[callback] parameter, potentially triggering arbitrary function execution via existing PHP gadget chains.

Is CVE-2025-2939 being actively exploited?

No, CVE-2025-2939 is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no public exploits have been disclosed as of now.

What versions of the Ninja Tables plugin are affected by CVE-2025-2939?

All versions up to and including Ninja Tables 5.0.18 are vulnerable. Version 5.0.19 and later contain the fix.

How do I check if my WordPress installation is vulnerable to CVE-2025-2939?

Log into WordPress Admin, go to Plugins, and check the version of Ninja Tables. If it shows 5.0.18 or earlier, your site is vulnerable. Alternatively, check the plugin directory at /wp-content/plugins/ninja-tables/ and examine the Version field in ninja-tables.php.

Does Defensia detect CVE-2025-2939?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If the Ninja Tables plugin is installed on a monitored WordPress server, CVE-2025-2939 will appear in your dashboard with remediation steps.

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References

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