AivahThemes Hostme v2: Unauthenticated PHP object injection via deserialization
Summary
The AivahThemes Hostme v2 WordPress theme up to and including version 7.0 contains a PHP object injection flaw (CWE-502) caused by unsafe deserialization of untrusted data. An unauthenticated remote attacker can send crafted input to a public site, which could allow harmful actions on the server, such as manipulating data or running code, depending on the PHP classes available. No vendor fix has been confirmed, and the CVSS base score is 9.8 (Critical).
Affected
- AivahThemes Hostme v2 (theme folder hostmev2), all versions up to and including 7.0
- Start of the affected range: n/a
Fixed in
Unknown. No fixed version has been confirmed. Do not assume that any version above 7.0 is patched.
Workaround
- No vendor workaround found.
- Deactivate and replace the theme where possible.
- If the theme must remain in use, restrict public access to the site where feasible.
- Apply WAF rules or virtual patching only after reviewing them against the Patchstack advisory.
Exploitation
- No evidence of known exploitation in the wild in the sources reviewed.
- No public proof of concept found.
- CISA SSVC: exploitation none, automatable yes, technical impact total.
- EPSS 0.00313 (low).
- Patchstack rates the issue as high priority and expects exploitation.
Our recommendation
- Check whether the theme is installed on any internet-facing site.
- Replace the theme or restrict public access as far as possible.
- Check the Patchstack advisory and the ThemeForest changelog regularly for a fix.
- Also review CVE-2026-112849, a cross-site scripting issue in the same theme.
- Monitor web server logs for unusual requests.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory patchstack.com
- ThemeForest Hostme v2 product page themeforest.net
- ThemeForest Hostme v2 support page themeforest.net
- VulDB entry (differing CVSS score 7.3) vuldb.com
- Vulners NVD record vulners.com
- Hol.org CVE entry hol.org
- Strix CVE entry www.strix.ai
- EUVD-2026-108955 (related XSS in same theme) 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, 16:51.
Original description (NVD)
Deserialization of Untrusted Data vulnerability in AivahThemes Hostme v2 hostmev2 allows Object Injection.This issue affects Hostme v2: from n/a through 7.0.
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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