• Sublime Core Feed
Medium Severity

Open redirect: emp.eduyield.com

Description

Message contains use of the eduyield redirect which chains google amp. This has been exploited in the wild.

References

No references.

Sublime Security
Created Sep 6th, 2024 • Last updated Jan 12th, 2026
Source
type.inbound
and any(body.links,
        .href_url.domain.domain == "emp.eduyield.com"
        // the redirect field
        and strings.icontains(.href_url.query_params, "&dest=")
        and regex.icontains(.href_url.query_params,
                            '&dest=(?:https?)?(?:(?:%3a|\:)?(?:\/|%2f){2})?google\.com[^\&]*\/+amp\/+(s\/+)?'
        )
)
and (
  not profile.by_sender().solicited
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_messages_benign
  )
)

// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)
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