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CVE-2026-73339 – Unauthenticated SQL Injection – Modern Events Calendar WordPress Plugin (< 7.35.0)

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Summary

CVE-2026-73339 is an unauthenticated SQL Injection (CWE-89) vulnerability in the Modern Events Calendar WordPress plugin, developed by Webnus Inc., affecting all versions prior to 7.35.0. The flaw allows a remote, unauthenticated attacker to inject SQL through the plugin without any prior access to the WordPress site, and carries a CVSS v3.1 base score of 9.3 (Critical).

Technical details

  • Root cause: improper neutralization of special elements in an SQL command (SQL Injection, CWE-89) within the Modern Events Calendar plugin’s handling of input passed into database queries.
  • Trigger conditions: the vulnerability is exploitable without authentication and without any user interaction, over the network.
  • Attack vector: Network (AV:N), low attack complexity, no privileges required, no user interaction — consistent with a blind SQL injection (CAPEC-7).
  • Impact: high confidentiality impact and low availability impact, with a changed scope, indicating data exposure beyond the vulnerable component itself (e.g., database contents accessible to the attacker).

Affected software

  • Modern Events Calendar (Webnus Inc.) — all versions prior to 7.35.0.
  • Fixed in version 7.35.0.

Severity

  • CVSS v3.1 Base Score: 9.3 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Mitigation and recommended actions

  • Immediate: Update the Modern Events Calendar WordPress plugin to version 7.35.0 or later.
  • If immediate patching is not possible: restrict or monitor direct access to the plugin’s front-end endpoints, deploy a web application firewall rule to detect SQL injection payloads, and audit site/database logs for anomalous query behavior until the update can be applied.

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/modern-events-calendar-lite/, /wp-content/plugins/modern-events-calendar/

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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  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
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