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CVE-2026-73187 – Unauthenticated SQL Injection – Sticky Chat Widget WordPress Plugin (≤ 1.4.2)

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Summary

CVE-2026-73187 is an unauthenticated SQL Injection vulnerability (CWE-89) affecting the Sticky Chat Widget WordPress plugin, developed by gingerplugins, in versions 1.4.2 and earlier. The flaw allows a remote, unauthenticated attacker to inject arbitrary SQL commands into the underlying database, and has been assigned a CVSS v3.1 base score of 9.3 (Critical).

Technical details

  • Root cause: Improper neutralization of special elements used in SQL commands (CWE-89) within the plugin’s handling of user-supplied input, allowing crafted input to be interpreted as SQL syntax.
  • Trigger conditions: No authentication or user interaction is required; the affected input can be reached directly by any remote party.
  • Attack vector: Network — the vulnerable functionality is exposed over HTTP(S) on any WordPress site running the affected plugin version.
  • Impact: Successful exploitation can lead to unauthorized disclosure of database contents (high confidentiality impact) and can degrade availability of the affected component (low availability impact), consistent with blind SQL injection techniques (CAPEC-7).

Affected software

  • Sticky Chat Widget (WordPress plugin) by gingerplugins — versions up to and including 1.4.2

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 Sticky Chat Widget plugin to version 1.4.3 or later, which contains the fix for this vulnerability.
  • If immediate patching is not possible: Restrict or disable the plugin until it can be updated, and monitor web server/database logs for anomalous query patterns indicative of SQL injection attempts targeting the plugin’s endpoints. A web application firewall (WAF) rule set covering SQL injection payloads can provide interim risk reduction but does not replace patching.

References

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