itthinx Affiliates WordPress plugin: PHP object injection via untrusted data
Summary
The Affiliates WordPress plugin up to and including version 7.0.1 deserializes untrusted data, which allows PHP object injection. According to the CNA, the flaw can be exploited remotely without authentication or user interaction, and the CVSS base score is 9.8. An attacker who can reach a vulnerable WordPress site may be able to manipulate how the site processes data and run harmful actions on the server.
Affected
- Affiliates plugin for WordPress, version 7.0.1 and earlier (per Patchstack and the CVE record)
- Premium editions (Affiliates Pro, Enterprise): unknown
Fixed in
- Version 7.1.0 of the Affiliates plugin (per Patchstack)
- Premium editions: unknown
Workaround
- No vendor-documented workaround.
- Patchstack offers a virtual-patching option, which was not verified.
Exploitation
- No confirmed exploitation in the wild in the sources reviewed. Patchstack expects exploitation based on the severity.
- CISA SSVC: exploitation none, automatable yes, technical impact total.
- VulDB reports no public exploit available.
- CISA KEV status: unknown.
Our recommendation
- Inventory all WordPress sites for the Affiliates plugin, including Pro and Enterprise editions, and record the installed version.
- Update to version 7.1.0 or later on every affected site, or ask the hosting provider or web developer to do so.
- Check affected sites for signs of compromise, such as unexpected admin users, modified plugin or theme files and unknown scheduled tasks.
- Monitor the NVD entry and the vendor's release notes, as no vendor advisory has been confirmed yet.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory CVE-2026-108291 patchstack.com
- VulnRichment CVE-2026-108291 vulners.com
- VulDB entry 419821 vuldb.com
- WordPress.org Affiliates plugin wordpress.org
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, 18:01.
Original description (NVD)
Deserialization of Untrusted Data vulnerability in itthinx Affiliates affiliates allows Object Injection.This issue affects Affiliates: from n/a through 7.0.1.
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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