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01 Record

CVE-2025-13591

Username Enumeration via Authentication Endpoint in WSO2 Identity Server Allows User Account Discovery

MediumPUBLISHEDCNA: WSO2
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

02 Description

Username Enumeration via Authentication Endpoint in WSO2 Identity Server Allows User Account Discovery

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.29% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 22.1% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-20.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-19 16:45Z10 DAYS AGO
Last updated
2026-10-20 19:32Z8 DAYS AGO
Reserved
2025-11-24
Assigning CNA
WSO2
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
Data version
5.2
Document digest
853dd6f938e52c6faaa113a8690e2430010bd935fe09be2dc037b210eaf6ac54

05 Affected products

VendorProductVersionsPlatforms
WSO2WSO2 Identity Server7.0.0 to < 7.0.0.134, 7.1.0 to < 7.1.0.42—
WSO2WSO2 Carbon Abstract OTP Authenticator1.0.5 to < 1.0.5.3, 1.0.10 to < 1.0.10.2—
WSO2Email OTP Authenticator1.0.18 to < 1.0.18.8, 1.0.30 to < 1.0.30.5—

06 References

07 Remediation

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4583/#solution