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CVE-2026-13596 – Unauthenticated SQL Injection – Participants Database WordPress Plugin before 2.7.8

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Summary

CVE-2026-13596 is an unauthenticated SQL injection vulnerability in the Participants Database WordPress plugin in all versions before 2.7.8.4. The plugin fails to properly sanitize and escape a user-supplied parameter before using it in a SQL query, allowing remote attackers to execute arbitrary SQL commands without authentication. It carries a CVSS v3.1 base score of 9.1 (Critical).

Technical details

  • Root cause: The plugin does not properly sanitize and escape a user-supplied parameter before using it in a SQL query (CWE-89: SQL Injection).
  • Trigger conditions: The flaw is reachable through the plugin’s List Search functionality and requires no authentication.
  • Attack vector: Network — a remote, unauthenticated attacker sends crafted input to a vulnerable site with low attack complexity and no user interaction.
  • Impact: Execution of arbitrary SQL queries against the WordPress database, enabling data exfiltration and manipulation of stored data.

Affected software

  • Participants Database WordPress plugin: all versions before 2.7.8.4.

Severity

  • CVSS v3.1 base score: 9.1 (Critical)
  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: Upgrade the Participants Database plugin to version 2.7.8.4 or later.
  • If no patch can be applied: Restrict or disable public access to the plugin’s search functionality, and place a web application firewall in front of the site to filter SQL injection attempts targeting plugin parameters.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /wp-content/plugins/participants-database/

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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  • Confirmation of verified exploitable assets
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