CVE intelligence and bounded remediation

CVE-2025-1396 — A username enumeration vulnerability exists in multiple WSO2 products when Multi-Attribute Login is enabled

Medium CVSS 5.3

A username enumeration vulnerability exists in multiple WSO2 products when Multi-Attribute Login is enabled. In this configuration, the system returns a distinct "User does not exist" error message to the login form, regardless of the validate_username setting. This behavior allows malicious actors to determine which usernames exist in the system based on observable discrepancies in the application's responses. Exploitation of this vulnerability could aid in brute-force attacks, targeted phishing campaigns, or other social engineering techniques by confirming the validity of user identifiers within the system.

Severity
Medium
CVSS
5.3 (3.1)
Published
2025-09-26
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-203

Affected products

  • wso2 / identity_server / 5.10.0
  • wso2 / identity_server / 5.11.0
  • wso2 / identity_server / 6.0.0
  • wso2 / identity_server / 6.1.0
  • wso2 / identity_server_as_key_manager / 5.10.0
  • wso2 / open_banking_iam / 2.0.0

Matched remediation archetype

Information disclosure and sensitive data exposure

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace sensitive data through responses, errors, logs, metrics, traces, caches, exports, files, backups, and client bundles.
  • Identify affected subjects, tenants, retention windows, access controls, and downstream copies without opening unnecessary sensitive records.
  • Review metadata, timing, status, length, and existence signals as well as direct content disclosure.

Remediate safely

  • Minimize collection and output, apply field-level authorization and redaction at a centralized boundary, and return generic external errors.
  • Remove secrets and sensitive data from logs, artifacts, URLs, caches, and client-side bundles; rotate credentials that may have been exposed.
  • Update the affected component and add synthetic-data tests for response, error, observability, and export paths.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.