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CVE-2026-42684 – Unauthenticated Blind SQL Injection – WP Job Portal WordPress Plugin (≤ 2.5.1)

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Summary

CVE-2026-42684 is a critical Blind SQL Injection vulnerability in the WP Job Portal WordPress plugin, affecting all versions through 2.5.1. Disclosed on June 2, 2026, the flaw allows any unauthenticated, remote attacker to interact directly with the underlying WordPress database, with a CVSS v3.1 score of 9.3 (Critical). With 8,000+ active installations on internet-facing WordPress sites, the potential attack surface is significant.

Technical details

  • Root cause: Improper neutralization of special elements used in SQL commands (CWE-89) — user-supplied input is not adequately sanitized or parameterized before being incorporated into database queries.
  • Trigger conditions: No authentication, special privileges, or user interaction are required. Any remote, unauthenticated attacker can send a crafted HTTP request to trigger the injection.
  • Attack vector: Network-accessible (AV:N), low complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N). The scope is changed (S:C), meaning the impact extends beyond the vulnerable component itself.
  • Impact: Successful exploitation enables blind SQL injection, allowing attackers to exfiltrate sensitive database contents — including user credentials, private job applications, employer data, and personally identifiable information (PII). Confidentiality impact is rated High (C:H). Patchstack, which discovered and reported the vulnerability, characterizes it as "highly dangerous and expected to become exploited" — consistent with the pattern seen in mass-exploit campaigns targeting WordPress plugins.

Affected software

  • WP Job Portal (WordPress plugin by Ahmad / wpjobportal): all versions from the beginning through 2.5.1 (inclusive)

Severity

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

Mitigation and recommended actions

  • Immediate action — patch now: Update WP Job Portal to version 2.5.2 or later. The plugin changelog confirms version 2.5.2 contains security fixes addressing this vulnerability. The latest available version is 2.5.4.
  • If immediate patching is not possible: Restrict external network access to WordPress admin and plugin endpoints at the web application firewall (WAF) or perimeter level as a temporary measure until the patch can be applied. Monitor database activity for anomalous query patterns.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

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