Security Resilience

CWE · MITRE source

CWE-942Permissive Cross-domain Security Policy with Untrusted Domains

Abstraction: Variant · CVEs in our corpus: 137

The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.

If a cross-domain policy file includes domains that should not be trusted, such as when using wildcards under a high-level domain, then the application could be attacked by these untrusted domains. In many cases, the attack can be launched without the victim even being aware of it.

Last updated: 16 October 2026 14:24 UTC

OWASP Top 10 for Web (2025)

This weakness contributes to A02:2025 Security Misconfiguration.

Control responseHuman-reviewed

Answering this weakness across the control lifecycle, from our framework cross-walks.

Prevent
Stop it (NIST 800-53 / CSF Protect)
  • PR.PS-01
  • PR.PS-06
  • AC-4 Information Flow Enforcement
  • SC-7 Boundary Protection
Detect
Catch it (CSF Detect / Respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V3.4.3
  • V3.4.6
  • V3.5.2

NIST 800-53 r5 controls PROPOSED for this weakness (0)AI-assisted

These are model PROPOSALS, not graded mappings. They come from controls_to_cwe_proposals, which carries no grade field at all; across the CWE pages 1,540 of 1,722 such associations (89%) have never been graded by anything. The heading said “address” until 2026-09-29, which asserted a relationship the data does not carry. Graded cross-walks are on the framework map, not here.

Control Title Family Why it addresses this CWE
No NIST controls proposed yet.

Top CVEs of this weakness type, ranked by Risk Priority

CVE Risk CVSS EPSS Published
CVE-2026-597267.910.00.03022026-07-09
CVE-2026-22812 7.78.80.16542026-01-12
CVE-2022-31736 7.59.80.01072022-12-22
CVE-2022-26969 7.59.80.00962022-12-26
CVE-2025-61163 7.29.80.00282026-08-26
CVE-2024-25124 7.19.40.00662024-02-21
CVE-2026-34449 6.99.60.00802026-03-31
CVE-2026-8948 6.99.10.00452026-05-19
CVE-2026-617366.99.30.01422026-07-15
CVE-2023-38125 6.88.80.01342024-05-03
CVE-2026-287926.89.60.00652026-03-12
CVE-2026-30924 6.79.60.00462026-03-19
CVE-2026-53649 6.79.60.00332026-09-02
CVE-2026-628956.78.80.00822026-09-08
CVE-2021-34435 6.68.80.00602021-09-01
CVE-2026-34227 6.68.80.00472026-03-31
CVE-2026-46409 6.69.60.00282026-08-07
CVE-2024-11071 6.48.80.00202025-04-07
CVE-2026-591486.48.80.00262026-07-09
CVE-2026-1181 6.39.00.00352026-01-19
CVE-2024-41659 6.28.10.00642024-08-20
CVE-2024-41657 6.28.10.00792024-08-20
CVE-2026-56076 6.28.10.00642026-06-18
CVE-2026-82291 6.28.10.00552026-08-28
CVE-2023-23464 6.18.10.00482023-02-15