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CVE-2026-65876 – Unauthenticated SQL Injection – SP Page Builder for Joomla (< 6.7.1)

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Summary

CVE-2026-65876 is a critical, unauthenticated SQL injection vulnerability in SP Page Builder, a widely-deployed page-builder extension for Joomla developed by joomshaper.com. The flaw arises from improper validation of the catid parameter in the public-facing loadMoreArticles endpoint, allowing any anonymous attacker over the network to inject arbitrary SQL commands. The vulnerability carries a CVSS 4.0 score of 9.2 (Critical) and affects all SP Page Builder versions from 1.0.0 through 6.7.0.

Technical details

  • Root cause: Improper neutralization of user-supplied input (CWE-89) in the catid parameter handled by the loadMoreArticles HTTP endpoint. The endpoint performs no adequate validation or sanitization before incorporating the parameter into SQL queries.
  • Trigger conditions: No authentication or user interaction is required. An attacker sends a crafted HTTP request to the loadMoreArticles endpoint with a malicious catid value. This endpoint is publicly reachable on any Joomla site running the extension.
  • Attack vector: Network (AV:N); no prior access, credentials, or victim interaction needed (PR:N, UI:N). Attack complexity is Low (AC:L) with no attack requirements (AT:N).
  • Impact: High confidentiality impact at both the vulnerable component and subsequent system levels (VC:H, SC:H). Successful exploitation enables an unauthenticated attacker to extract data from the Joomla database, including user credentials, session tokens, configuration data, and any other information stored within the database. No integrity or availability impact is asserted in the CVSS vector.
  • Credited researcher: Krzysztof Zając, CERT PL.

Affected software

  • SP Page Builder extension for Joomla by joomshaper.com — versions 1.0.0 through 6.7.0 (all versions prior to 6.7.1)

Severity

  • CVSS 4.0 Base Score: 9.2 (Critical)
  • CVSS 4.0 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Mitigation and recommended actions

  • Immediate action — patch now: Upgrade SP Page Builder to version 6.7.1 or later, which contains the vendor-issued fix for this vulnerability. This is the only confirmed remediation.
  • If immediate patching is not possible: Restrict or block public access to the loadMoreArticles endpoint at the web application firewall or reverse proxy layer, and monitor for anomalous SQL-pattern traffic directed at Joomla instances running SP Page Builder.
  • Audit exposure: Review all Joomla deployments within your environment for the presence of the SP Page Builder extension and prioritize upgrading across all instances.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. SP Page Builder has been an active target throughout 2026, and this new unauthenticated SQL injection vector in the same product raises the urgency for organizations with exposed Joomla deployments. Potentially affected assets are outlined in this post.

References

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