EUVD-2026-18531
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/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
3Description
Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to version 1.4.10, the verifyIdentity() function contained logic that returned true if no session cookies were present. This allowed unauthenticated attackers to bypass security checks and access/modify user settings via the /api/settings endpoint by providing arbitrary headers. This issue has been patched in version 1.4.10.
Analysis
Unauthenticated authentication bypass in Bulwark Webmail versions prior to 1.4.10 allows remote attackers to access and modify user settings without credentials. The vulnerability stems from flawed verifyIdentity() logic that returns true when session cookies are absent, enabling unauthorized manipulation of the /api/settings endpoint through arbitrary header injection. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 24 hours: Inventory all Bulwark Webmail instances and identify current versions. Within 7 days: Apply vendor-released patch to version 1.4.10 or later on all affected systems; implement network-based access controls restricting /api/settings endpoint to authenticated sessions pending patching. …
Sign in for detailed remediation steps.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today