Vikunja: OIDC email-fallback account linking ignores email_verified, enabling local-account takeover
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| go-vikunja | vikunja | affected |
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| Go-vikunja | Vikunja |
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| Source | ID | Title |
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Github GHSA |
GHSA-xv7q-fvmc-jx96 | Vikunja: OIDC email-fallback account linking ignores email_verified, enabling local-account takeover |
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.154% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Go-vikunja
Go-vikunja vikunja |
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| Vendors & Products |
Go-vikunja
Go-vikunja vikunja |
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| Description | Vikunja is an open-source self-hosted task management platform. In versions 1.0.0 through 2.3.0, when an administrator enables the per-provider `emailfallback` option on an OpenID Connect provider, Vikunja links an SSO login to a pre-existing local (username+password) account using only the `email` claim from the IdP. The fallback never checks an `email_verified` (or Microsoft `xms_edov`) signal and never requires the matched account's password. An attacker who can obtain a token from the configured issuer carrying a victim's email logs in as that victim with a full session, with no consent or interaction from the victim. Version 2.4.0 fixes the issue. | |
| Title | Vikunja: OIDC email-fallback account linking ignores email_verified, enabling local-account takeover | |
| Weaknesses | CWE-287 CWE-290 CWE-345 |
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| References |
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| Metrics |
cvssV4_0
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