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CVE-2026-74015 – Unauthenticated Blind SQL Injection – Readabler WordPress Plugin < 2.0.18

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Summary

CVE-2026-74015 is an unauthenticated SQL injection vulnerability in the Readabler WordPress plugin, developed by merkulove. The flaw allows a remote, unauthenticated attacker to inject malicious SQL statements into the application’s database queries, and it carries a CRITICAL CVSS v3.1 score of 9.3.

Technical details

  • Root cause: improper neutralization of special elements used in an SQL command (CWE-89) within the Readabler plugin’s codebase.
  • Trigger conditions: no authentication or user interaction is required to exploit the flaw.
  • Attack vector: network-based, low attack complexity, exploitable over HTTP(S) against any internet-exposed WordPress site running the vulnerable plugin.
  • Impact: high confidentiality impact (database contents can be disclosed, consistent with blind SQL injection per CAPEC-7) and partial availability impact; the scope is changed (S:C), and no integrity impact is recorded.

Affected software

  • Readabler WordPress plugin (vendor: merkulove), all versions prior to 2.0.18
  • Fixed in version 2.0.18

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 Readabler plugin to version 2.0.18 or later.
  • If no patch can be applied immediately: restrict or monitor unauthenticated access to the site’s front-end query parameters processed by the plugin, and deploy a web application firewall rule to detect/block SQL injection payloads targeting Readabler-related endpoints until the update can be applied.

References

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