Authenticated phishing via unchecked social-login return URL
Published Jun 22, 2026 · Updated Jun 22, 2026
Open redirect in Venueless before d27864a7 allows remote authenticated users to send victims to attacker-chosen sites through social login. The social_connect handler accepted body["return_url"] without checking its host or scheme before retaining it as the post-login destination. Exploitation requires an authenticated event account, LinkedIn social login, and a victim who follows the crafted flow; the result is phishing under a trusted event domain.
Summary
What happened
Open redirect in Venueless before d27864a7 allows remote authenticated users to send victims to attacker-chosen sites through social login. The social_connect handler accepted body["return_url"] without checking its host or scheme before retaining it as the post-login destination. Exploitation requires an authenticated event account, LinkedIn social login, and a victim who follows the crafted flow; the result is phishing under a trusted event domain.
The record
- CVE
- CVE-2026-12863
- Published
- Jun 22, 2026
- Updated
- Jun 22, 2026
- Vendor
- pretix GmbH
- Product
- Venueless
- Classifications
- CWE-601, T1566.002
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 22, 2026CVE publishedPublication date reported by the CVE source.
- Jun 22, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0.0.0 <d27864a7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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