ExpressTech Quiz And Survey Master: PHP Object Injection in WordPress plugin
Summary
The WordPress plugin Quiz And Survey Master (quiz-master-next) up to and including version 11.2.7 contains a PHP Object Injection vulnerability (CWE-502) caused by unsafe deserialization of untrusted data. An authenticated attacker with a Contributor-level account may be able to manipulate how the site processes data and run harmful actions on the server. No active exploitation or public exploit is known, but the fix commit is public, so n-day exploitation is possible.
Affected
- ExpressTech Quiz And Survey Master (WordPress plugin, package quiz-master-next) up to and including 11.2.7
Fixed in
- Version 11.2.8 or later
Workaround
- No vendor workaround documented.
- Review and remove unneeded accounts with Contributor or higher roles until the update is applied.
Exploitation
- Exploited in the wild: nothing known.
- Public PoC: none found; the fix pull request describes the code path publicly.
- EPSS: about 0.29%.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- Required privilege: Contributor (working assumption, not yet verified on the Patchstack page).
Our recommendation
- Update the plugin to version 11.2.8 or later on every site where it is installed.
- Check which accounts hold Contributor or higher roles and remove unneeded ones.
- Monitor for unusual plugin activity and keep the plugin patched, as it has had many recent authenticated flaws.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack: PHP Object Injection in WordPress Quiz And Survey Master Plugin patchstack.com
- NVD record via Vulners vulners.com
- CVE List record via Vulners vulners.com
- Fix pull request 3278 github.com
- Release pull request 3282 github.com
- Pull request 3283 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 31 Oct 2026, 20:55.
Original description (NVD)
Deserialization of Untrusted Data vulnerability in ExpressTech Quiz And Survey Master quiz-master-next allows Object Injection.This issue affects Quiz And Survey Master: from n/a through 11.2.7.
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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