Gutentype WordPress theme: PHP Object Injection via untrusted data deserialization
Summary
The Gutentype WordPress theme by ThemeREX Group, in versions up to and including 2.1.12, deserializes untrusted data, which allows PHP object injection. An unauthenticated remote attacker may be able to manipulate how the site processes data and run harmful actions on the server. Whether a usable gadget chain exists is not stated in the sources, so the CVSS score of 9.8 should be treated as the worst case.
Affected
- Gutentype WordPress theme from n/a through 2.1.12 (lower bound unclear, assume all earlier versions are affected)
Fixed in
- Unknown. No fixed version confirmed by the vendor or Patchstack.
- Newer releases (2.1.13, 2.1.14) exist, but no source confirms they fix this issue.
Workaround
- Unknown. No vendor or Patchstack workaround found.
- Patchstack has issued a mitigation rule that blocks attacks until an official patch is available (per Patchstack's advisory, which you must use via their service).
Exploitation
- No known exploitation in the wild found.
- No public proof of concept found.
- CISA SSVC assessment: Exploitation none, Automatable yes, Technical Impact total.
- Patchstack states the flaw is expected to become exploited, but this is not evidence of exploitation.
Our recommendation
- Identify every site running the Gutentype theme, including staging and forgotten sites, and record the installed version.
- Restrict access to the admin area and to unneeded endpoints.
- Keep WordPress core and all plugins up to date to reduce the risk of a usable gadget chain.
- Deploy a virtual patch or mitigation rule via a WordPress security service if available.
- Take a backup and plan to replace the theme if no fix is confirmed.
- Check whether the site is already compromised.
- Monitor the Patchstack entry and the vendor changelog for a fix.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory CVE-2026-62046 patchstack.com
- OpenCVE CVE-2026-62046 app.opencve.io
- VulDB 416135 vuldb.com
- ThemeForest Gutentype listing themeforest.net
- ThemeREX Gutentype download page themerex.net
- HOL Guard CVE-2026-62046 hol.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, 20:01.
Original description (NVD)
Deserialization of Untrusted Data vulnerability in ThemeREX Group Gutentype gutentype allows Object Injection.This issue affects Gutentype: from n/a through 2.1.12.
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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