Username enumeration via distinguishable failed-login responses
Published May 20, 2025 · Updated May 20, 2025
Observable response discrepancy in SEL-5056 NMS before 2.16.0 allows remote attackers to distinguish local from central usernames. The failed-login path returns distinguishable responses according to whether the submitted username belongs to the local or central identity source. No authentication or user interaction is required, but repeated comparisons are needed; the result reveals account-source membership without changing data.
Summary
What happened
Observable response discrepancy in SEL-5056 NMS before 2.16.0 allows remote attackers to distinguish local from central usernames. The failed-login path returns distinguishable responses according to whether the submitted username belongs to the local or central identity source. No authentication or user interaction is required, but repeated comparisons are needed; the result reveals account-source membership without changing data.
The record
- CVE
- CVE-2025-48015
- Published
- May 20, 2025
- Updated
- May 20, 2025
- Vendor
- Schweitzer Engineering Laboratories
- Product
- SEL-5056 Network Management System
- Classifications
- CWE-204, T1087
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 20, 2025CVE publishedPublication date reported by the CVE source.
- May 20, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2.16.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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