Critical Remote Code Execution in Apache Struts (CVE‑2018‑11776) Threatens Web Applications
What It Is – Apache Struts 2.3.20‑2.3.34 and 2.5.0‑2.5.16 contain a remote‑code‑execution flaw that can be triggered when a wildcard or missing namespace is combined with an un‑validated alwaysSelectFullNamespace setting or an empty URL tag.
Exploitability – Public PoCs exist; the vulnerability is rated CVSS 3.1 9.8 (Critical). Exploits can be launched over the network without authentication.
Affected Products – Apache Struts 2 (specific vulnerable versions listed above).
Why It Matters for Trust & Control Assurance
- Demonstrates the need for continuous vulnerability‑management controls and evidence that patches are applied promptly.
- Highlights the importance of secure configuration checks (e.g., ensuring default options are hardened) as a single control that satisfies multiple framework requirements.
- Enterprise buyers increasingly demand auditable proof that such high‑severity flaws are tracked, mitigated, and documented in a Trust Center.
Recommended Actions
- Verify whether any of your applications run a vulnerable Struts version; inventory all instances.
- Apply the Apache‑provided patches or upgrade to Struts 2.5.20 or later.
- Enable automated scanning for the specific configuration patterns (wildcard namespaces,
alwaysSelectFullNamespace=true). - Capture remediation evidence in your control‑mapping repository to demonstrate compliance readiness.
Source: CISA KEV – CVE‑2018‑11776