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CVE-2025-15688 – Unauthenticated SQL Injection – Capella WordPress Theme (≤ 2.5.5)

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Summary

CVE-2025-15688 is an unauthenticated SQL Injection vulnerability affecting the Capella WordPress theme, developed by ThemeGoods, in versions 2.5.5 and earlier. The flaw allows a remote, unauthenticated attacker to inject and execute arbitrary SQL commands against the site’s database. It carries a CVSS v3.1 base score of 9.3 (Critical).

Technical details

  • Root cause: Improper neutralization of special elements used in an SQL command (CWE-89) within the Capella theme’s code, allowing user-supplied input to be incorporated into SQL queries without adequate sanitization or parameterization.
  • Trigger conditions: No authentication or user interaction is required to exploit the flaw.
  • Attack vector: Network-based (AV:N) — an attacker can send crafted requests directly to the affected WordPress site over the web.
  • Impact: Successful exploitation yields high confidentiality impact (unauthorized read access to database contents, e.g., extraction of user credentials or sensitive site data) and low availability impact, with no direct integrity impact per the published vector.

Affected software

  • ThemeGoods Capella WordPress theme — all versions up to and including 2.5.5

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: Upgrade the Capella theme to a version newer than 2.5.5 as soon as the vendor releases a patched build.
  • If no patch is yet available: Restrict or monitor direct external access to the WordPress site, deploy a Web Application Firewall (WAF) with SQL injection detection/blocking rules in front of the site, and review database and web server logs for anomalous query patterns indicative of injection attempts. Consider taking the theme offline or switching to an alternative theme until a fix is confirmed.

How IONIX identifies potentially affected assets

IONIX matches the following signal against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /wp-content/themes/capella/

References

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