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CVE-2026-56292 – Unauthenticated SQL Injection – AcyMailing extension for Joomla versions prior t…

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Summary

CVE-2026-56292 is a critical unauthenticated SQL injection vulnerability (CWE-89) in the AcyMailing email marketing extension for Joomla, affecting all versions prior to 10.11.1. Carrying a CVSS v4.0 score of 9.2 (Critical), the flaw allows a remote, unauthenticated attacker to perform unauthorized database access and exfiltrate sensitive data with no user interaction required. A patch was released by the vendor on July 9, 2026; no public proof-of-concept exploit has been published at this time.

Technical details

  • Root cause: Improper neutralization of special elements in SQL commands (CWE-89). User-supplied request parameters are inserted directly into the column list of a database SELECT query executed by a public-facing AcyMailing front-end endpoint without sanitization or parameterization.
  • Trigger conditions: The vulnerability is reachable through an unauthenticated front-end request to the AcyMailing component (com_acymailing). No CSRF token, valid session, or prior data knowledge is required to trigger the injection.
  • Attack vector: Network-accessible; exploitation requires only a single crafted HTTP request sent over the network to an internet-exposed Joomla installation running a vulnerable version of AcyMailing.
  • Impact: Successful exploitation enables unauthorized read access to underlying database tables, including Joomla user accounts and bcrypt password hashes, site content records, and extension configuration data. The CVSS v4.0 score reflects high confidentiality impact on the primary system (VC:H) and high confidentiality, integrity, and availability impact on subsequent systems (SC:H/SI:H/SA:H), indicating potential for full database compromise and data exfiltration affecting connected infrastructure.

Affected software

  • AcyMailing extension for Joomla: all versions prior to 10.11.1

Severity

  • CVSS v4.0 Score: 9.2 (Critical) — assigned by the Joomla! CNA
  • CVSS v4.0 Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H
  • CWE: CWE-89 – Improper Neutralization of Special Elements used in an SQL Command (‘SQL Injection’)

Note: CVSS v3.x scoring has not yet been published by NVD for this CVE. The v4.0 score above is the authoritative assigned severity.

Mitigation and recommended actions

  • Immediate action: Upgrade AcyMailing to version 10.11.1 or later, released July 9, 2026. The vendor’s changelog confirms: "A vulnerability allowing SQL injection has been patched. Updating is strongly recommended."
  • If immediate patching is not feasible: Restrict network access to the AcyMailing front-end component endpoint via web application firewall (WAF) rules or server-level controls. Block or rate-limit unauthenticated requests to Joomla component paths associated with AcyMailing (?option=com_acymailing). Monitor database logs for anomalous or unexpected SELECT 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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