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

Weakness Summary

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.

  • Canonical source: MITRE CWE-942 (opens in a new tab)
  • Published Atomicorp CVE observations: 3
  • Distinct affected products in those observations: 3
  • Active Atomicorp rules associated with this weakness: 15

Atomicorp Research Context

Atomicorp has published CVE-specific research observations associated with this weakness category. Each linked CVE page states whether the tested request was detected or blocked and is the authoritative customer-facing finding.

The CVEs and rules shown here are selected published examples, not a complete list of Atomicorp protections. If a CWE, CVE, or rule is absent from this page, no conclusion should be drawn about whether Atomicorp protects against that weakness or attack method.

A CWE describes a class of software weakness. It does not identify one exploit request, and association with a CWE does not mean that every vulnerability or exploitation path in that category is detected or blocked.

Selected Published CVE Observations

CVEVulnerabilityProductAtomicorp findingObserved rules
CVE-2026-34449SiYuan: Cross-Origin RCE via Permissive CORS Policy and JavaScript Snippet InjectionsiyuanProtected by Atomicorp rules340014 , 340023 , 340029 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 345240 , 393655
CVE-2026-53649Joro: Unauthenticated Cross-Origin Plugin Upload Leads to RCEjoroProtected by Atomicorp rules340014 , 340023 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 393655
CVE-2020-36851Rob–W cors-anywhere Misconfigured CORS Proxy Allows SSRFRob–W / cors-anywhereProtected by Atomicorp rules390719 , 398021 , 398022 , 398023

Associated Atomicorp WAF Rules

RuleStatusBehavior
340014Activedisruptive (deny)
340023Activedisruptive (deny)
340029Activedisruptive (deny)
344360Activedisruptive (deny)
344361Activedisruptive (deny)
344363Activedisruptive (deny)
344364Activedisruptive (deny)
344366Activedisruptive (deny)
344370Activedisruptive (deny)
345240Activedisruptive (deny)
390719Activedisruptive (deny)
393655Activedisruptive (deny)
398021Activedisruptive (deny)
398022Activedisruptive (deny)
398023Activedisruptive (deny)