An issue in Webasyst Framework 4.0.3 and before allows a remote attacker to execute arbitrary code via a crafted OAuth authorization URL with an arbit

Summary

An issue in Webasyst Framework 4.0.3 and before allows a remote attacker to execute arbitrary code via a crafted OAuth authorization URL with an arbitrary redirect_uri.

Remediation

1. Inventory every Unknown product deployment, including staging.
2. No fixed version appears in the public sources yet. Check the references below and the vendor directly.

References

• Referencehttps://github.com/webasyst/webasyst-framework/issues/389
• Referencehttps://support.webasyst.com/forum/48658/unvalidated-redirect_uri-in-oauth-authorization-flow-allows-authorization-code-interception-and-permanent-api-access/
• Referencehttps://github.com/Envincion/CVE-2026-51954