Rosalinda WordPress theme: PHP object injection via untrusted deserialization
Summary
The Rosalinda WordPress theme up to and including version 1.2.4 deserializes untrusted data, which allows PHP object injection (CWE-502). The CNA scores the issue 9.8 (CRITICAL) with no authentication required, and Patchstack describes it as high priority. Whether a usable gadget chain exists in the theme or WordPress core is not confirmed, so the practical risk may be lower than the score suggests.
Affected
- Rosalinda theme from n/a through 1.2.4 (WordPress)
- Start of the affected range: Unknown.
- Version conflict: a reseller lists 1.2.2 as latest, which must be checked against the installed version.
Fixed in
Unknown. No fixed version or vendor patch is named in the sources.
Workaround
Unknown. No vendor-confirmed workaround. Patchstack reports a mitigation rule that blocks attacks until an official patch is available; confirm with Patchstack before relying on it.
Exploitation
- Not listed in CISA KEV.
- CISA SSVC: exploitation none, automatable yes, technical impact total.
- VulDB: EPSS 0.00000, activity very low.
- No public proof of concept found in the research.
Our recommendation
- Inventory all WordPress sites for the Rosalinda theme and record exact versions.
- Obtain the fixed version from the ThemeForest changelog or the developer, or ask Patchstack for a virtual patch.
- If no fix is available, consider switching public production sites to a different theme.
- Remove unused theme installations.
- Check affected public sites for suspicious activity.
- Check other ThemeREX themes on the same sites, as related deserialization issues were published in the same batch (CVE-2026-93931, CVE-2026-93930).
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory patchstack.com
- OpenCVE CVE-2026-93933 app.opencve.io
- VulDB CVE-2026-93933 vuldb.com
- Patchstack PHP Object Injection academy patchstack.com
- ThemeForest Rosalinda listing themeforest.net
- Strix CVE-2026-93930 (related ThemeREX issue) www.strix.ai
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, 19:56.
Original description (NVD)
Deserialization of Untrusted Data vulnerability in ThemeREX Group Rosalinda rosalinda allows Object Injection.This issue affects Rosalinda: from n/a through 1.2.4.
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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