EUVD-2026-38221Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attacker requires no authentication to craft the redirect URL; UI:R because victim must click and authenticate; integrity-only impact via deceptive redirect with no server-side data exposure.
Primary rating from Vendor (rami.io).
CVSS VectorVendor: rami.io
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
1DescriptionCVE.org
An unvalidated redirect was contained in Venueless' social login functionality and could be exploited for phishing using trusted domains.
AnalysisAI
Unvalidated redirect in Venueless social login allows phishing attacks by abusing the trusted domain reputation of legitimate event platform instances. Any Venueless deployment with social login enabled is affected across all tracked versions (CPE wildcard), and an attacker can craft a social login URL embedding an arbitrary external redirect destination that executes silently after a victim completes OAuth authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the targeted Venueless instance has social login functionality enabled and configured - deployments where social login is fully disabled are not exposed to this attack path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.1 (Medium) appropriately reflects that direct data compromise of the Venueless server is not possible - the attacker gains no server-side access, credentials, or privileged information through this flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker targeting attendees of an event hosted on a Venueless instance crafts a social login URL embedding a redirect parameter pointing to an attacker-controlled phishing page - for example, a URL on the legitimate event domain with a 'next' parameter set to an external credential-harvesting site. The attacker distributes this URL via event-related emails or messaging channels, where the trusted event domain in the link lowers victim suspicion; after the victim authenticates with their social provider, they are silently forwarded to the attacker's page, which may mimic the event platform or prompt for additional credentials. … |
| Remediation | The primary remediation is to upgrade Venueless to the patched version identified in the GitHub Security Advisory at https://github.com/venueless/venueless/security/advisories/GHSA-m87f-7c4r-w4p3; the exact fixed version number was not present in the provided intelligence and must be confirmed directly from that advisory before deployment. … Detailed patch versions, workarounds, and compensating controls in full report. |
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