Dynamic User Directory WordPress plugin: PHP Object Injection
Summary
The WordPress plugin Dynamic User Directory up to and including version 2.4 is affected by a PHP Object Injection vulnerability (CWE-502) that can be triggered by a subscriber-level user, according to the CVE title. The CVSS vector assumes no privileges are required, and this discrepancy is not yet resolved. Successful exploitation may allow an attacker to manipulate data processing on the server, with impacts that Patchstack and the CVSS score rate as critical (CVSS 9.8). Exploitation in the wild has not been confirmed, and CISA SSVC lists exploitation as none.
Affected
- Dynamic User Directory WordPress plugin, all versions up to and including 2.4
- Required privilege level: unclear (title says Subscriber, CVSS vector says PR:N)
Fixed in
Unknown. No fixed version has been confirmed by the vendor or Patchstack.
Workaround
- No vendor-issued workaround known.
- Deactivate and remove the plugin if the directory feature is not business-critical.
- Restrict public user registration and review subscriber accounts.
- Place a web application firewall in front of the site and check whether it has a rule for this CVE.
Exploitation
- Exploited in the wild: no evidence found.
- CISA SSVC: exploitation none, automatable yes, technical impact total.
- Not listed in CISA KEV; EPSS about 0.005.
- No public proof of concept found; this does not rule one out.
- The same plugin has a separate SQL injection, CVE-2026-42720, affecting versions up to 2.4.
Our recommendation
- Check whether any WordPress site runs Dynamic User Directory version 2.4 or earlier.
- Deactivate and remove the plugin until a fixed version is confirmed on the wordpress.org changelog or the Patchstack page.
- Review subscriber accounts and disable open registration if possible.
- Monitor for unexpected file changes, new admin accounts and unusual outbound connections.
- Treat the plugin as a whole, since CVE-2026-42720 also affects it.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory patchstack.com
- OpenCVE CVE-2026-42719 app.opencve.io
- Vulners CVE-2026-42719 vulners.com
- Vulners Patchstack advisory vulners.com
- HOL Guard CVE-2026-42719 hol.org
- WordPress.org plugin page en-ca.wordpress.org
- Vulners CVE-2026-42720 vulners.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 19:41.
Original description (NVD)
Subscriber PHP Object Injection in Dynamic User Directory <= 2.4 versions.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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