Photolia WordPress theme: Unauthenticated PHP object injection
Summary
The Photolia WordPress theme up to and including version 1.0.3 contains a PHP object injection flaw (CWE-502) that can be triggered without logging in. An attacker can send crafted serialized data to the website, which can lead to harmful actions on the server. The full impact depends on the other components installed on the site, and no fixed version has been confirmed by the vendor.
Affected
- Photolia WordPress theme up to and including 1.0.3
- Vendor data: affected versions <= 1.0.3
Fixed in
Unknown. No fixed version has been confirmed by the vendor. Do not assume that later releases such as 1.0.4 or 1.0.5 resolve this issue.
Workaround
- No vendor workaround confirmed.
- Ask your WAF or hosting provider about rules for PHP serialized-object payloads and test them before relying on them.
- Replace nulled or pirated copies with a licensed copy, as they cannot reliably receive vendor fixes.
Exploitation
- No public proof of concept found.
- Not listed in CISA KEV.
- CISA SSVC: exploitation none, automatable yes, technical impact total.
- EPSS 0.00328.
Our recommendation
- Check whether Photolia is installed on any internet-facing site and verify the installed version in the WordPress admin.
- Prioritise e-commerce sites with WooCommerce integration.
- Deactivate or remove the theme if no fixed version is available and the site does not need it.
- If the theme must stay active, apply a WAF rule or ask the hosting provider for temporary protection.
- Contact ThemeREX for a confirmed patched build and monitor the NVD entry for updates.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory CVE-2026-78535 patchstack.com
- OpenCVE CVE-2026-78535 app.opencve.io
- VulDB CVE-2026-78535 vuldb.com
- ThemeREX Photolia product page themerex.net
- ThemeForest Photolia item page themeforest.net
- GitHub CISA KEV and exploitation status issue github.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, 19:22.
Original description (NVD)
Unauthenticated PHP Object Injection in Photolia <= 1.0.3 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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