Helion WordPress theme: PHP Object Injection via untrusted data deserialization
Summary
The Helion WordPress theme up to and including version 1.1.12 deserializes untrusted data, which allows PHP Object Injection (CWE-502). The attack requires no login and no user interaction, so an attacker can send crafted requests to an internet-facing site. Successful exploitation could allow manipulation of server-side processing with potential impact on confidentiality, integrity and availability of the site.
Affected
- Helion WordPress theme, all versions up to and including 1.1.12
- CVSS 3.1 base score 8.1 (CNA/NVD); VulDB lists 7.3
Fixed in
Unknown. No vendor-confirmed fixed version has been identified. Newer ThemeForest releases exist, but no changelog entry was found that names this CVE.
Workaround
- Patchstack has published a virtual patch (mitigation rule) for this issue, which can be enabled through a WAF or security provider.
- Deactivate and remove the theme if it is not needed.
- Do not use unofficial or nulled copies of the theme.
Exploitation
- Known exploitation: none found at the time of writing.
- Public proof of concept: none found; VulDB states no exploit is available.
- EPSS 0.00257 (low predicted exploitation probability).
- CISA SSVC: exploitation none, automatable no, technical impact total.
- Qualys has published a detection, so scanners can now flag affected installations.
Our recommendation
- Inventory all WordPress sites, including staging sites, and check whether the Helion theme is installed.
- Confirm the installed version; treat version 1.1.12 and older as vulnerable.
- Check the ThemeForest changelog for a security fix for this CVE and update if one is confirmed.
- Until a fix is confirmed, enable virtual patching via a WAF or remove the theme.
- Monitor web server logs for unusual requests and review exposure of internet-facing sites.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory patchstack.com
- NVD record via Vulners vulners.com
- VulDB 425798 vuldb.com
- EUVD-2026-108949 vulners.com
- Hol Guard CVE summary hol.org
- ThemeForest Helion product page themeforest.net
- Qualys detection notification notifications.qualys.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 1 Nov 2026, 17:58.
Original description (NVD)
Deserialization of Untrusted Data vulnerability in ThemeREX Group Helion helion allows Object Injection.This issue affects Helion: from n/a through 1.1.12.
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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