Legal Stone WordPress theme: PHP Object Injection
Summary
The Legal Stone WordPress theme up to and including version 1.2.11 contains an unauthenticated PHP object injection vulnerability (CWE-502). An unauthenticated remote attacker can manipulate serialized data processed by the website, which may allow execution of harmful actions on the server. Patchstack rates the issue as critical (CVSS 9.8) and expects exploitation, but no fixed version or public exploit has been confirmed.
Affected
- Legal Stone WordPress theme, versions up to and including 1.2.11
- Child themes based on Legal Stone (unverified)
Fixed in
Unknown. No fixed version has been confirmed by the vendor or the CNA.
Workaround
- Deactivate the theme if it is not required and switch to a maintained theme
- Ask the WAF or security service provider whether a virtual patch rule exists; treat it as a temporary measure only
- Restrict access to wp-admin and XML-RPC by IP address where feasible
- Keep WordPress core, PHP and other plugins up to date
- Create a fresh backup before making any changes
Exploitation
- No evidence of exploitation in the wild found
- Not listed in CISA KEV
- No public proof of concept confirmed
- VulDB estimates exploit price at about USD 0 to 5k
Our recommendation
- Check all client WordPress sites for the Legal Stone theme and its version, including child themes
- If installed and no fixed version is confirmed, deactivate the theme and plan a migration, starting with internet-facing sites
- Review web server logs for unusual requests to the theme
- Monitor the Patchstack advisory and NVD for updates, as the NVD status is Deferred
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory CVE-2026-61997 patchstack.com
- VulDB entry 428539 vuldb.com
- GitHub triage record CVE-2026-61997 github.com
- Strix CVE-2026-61997 www.strix.ai
- ThreatInt CVE-2026-61997 cve.threatint.com
- ThemeForest Legal Stone listing themeforest.net
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, 15:58.
Original description (NVD)
Unauthenticated PHP Object Injection in Legal Stone <= 1.2.11 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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