CVE-2025-1396 | Username Enumeration in Multiple WSO2 Products with Multi-Attribute Login Enabled

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.

Published: 2025-09-26 Last update: 2025-10-06 Assigner: ed10eef1-636d-4fbe-9993-6890dfa878f8 Source: ed10eef1-636d-4fbe-9993-6890dfa878f8
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-1396 is rated Low Risk (17.2/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.03%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-1396

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-22 0.05% 0.03% -0.03%
2 2026-01-26 0.03% 0.05% +0.03%
3 2025-09-26 — 0.03% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-1396

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.7 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 1.4 ed10eef1-636d-4fbe-9993-6890dfa878f8
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2025-1396

GitHub Security Advisory for CVE-2025-1396

GHSA-w82p-r9vw-4rg5 · Severity: low · Ecosystem: maven — WSO2's Input Validation Management Service contains Observable Discrepancy when Multi-Attribute Login is enabled

Affected software / configurations for CVE-2025-1396

Vendor Product Version Raw CPE
wso2 identity_server 5.10.0 cpe:2.3:a:wso2:identity_server:5.10.0:*:*:*:*:*:*:*
wso2 identity_server 5.11.0 cpe:2.3:a:wso2:identity_server:5.11.0:*:*:*:*:*:*:*
wso2 identity_server 6.0.0 cpe:2.3:a:wso2:identity_server:6.0.0:*:*:*:*:*:*:*
wso2 identity_server 6.1.0 cpe:2.3:a:wso2:identity_server:6.1.0:*:*:*:*:*:*:*
wso2 identity_server_as_key_manager 5.10.0 cpe:2.3:a:wso2:identity_server_as_key_manager:5.10.0:*:*:*:*:*:*:*
wso2 open_banking_iam 2.0.0 cpe:2.3:a:wso2:open_banking_iam:2.0.0:*:*:*:*:*:*:*

References for CVE-2025-1396

cvelogic Threat Intelligence