Executive Summary

CVE-2023-43901 exposes an access‑control flaw in eMudhra emSigner v2.8.7’s AdHoc User creation form. Unauthenticated attackers can supply a registered user’s email to arbitrarily change that user’s username and privilege level, effectively enabling privilege escalation and data tampering without authentication. The vulnerability is not yet listed in CISA KEV.

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Authoritative CVE Metadata - CVSS Base Score: 7.5 (HIGH) - Published: 2023-11-14T05:15:08.767 - Last Modified: 2026-08-28T16:16:49.490

Original Description: Incorrect access control in the AdHoc User creation form of eMudhra emSigner v2.8.7 allows unauthenticated attackers to arbitrarily modify usernames and privileges by using the email address of a registered user.

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