CVE-2025-5802
Username Enumeration via Self Registration Flow in Multiple WSO2 Products Allows User Account Discovery
- 5.3MediumCVSS base score
- 0.33%Exploitation in 30 daysEPSS · top 74% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The self-registration flow accepts user-supplied input for usernames without adequately preventing the disclosure of username existence. When a user attempts to register with an existing username, the system responds with an error message that explicitly indicates the username is already in use. This behavior allows an attacker to discover valid usernames within the system. The discovery of valid usernames can facilitate subsequent attacks such as brute force, social engineering, and targeted phishing campaigns.
Timeline
ID reserved
By WSO2
- 16 months later
· 16 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WSO2CNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVDNVD · Deferred | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.33% · top 74% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
- unknown < 3.1.0
- affected 3.1.0 – < 3.1.0.354
- affected 3.2.0 – < 3.2.0.458
- affected 3.2.0 – < 3.2.0.478
- affected 3.2.1 – < 3.2.1.96
- affected 4.0.0 – < 4.0.0.379
- affected 4.1.0 – < 4.1.0.262
- affected 4.2.0 – < 4.2.0.200
- affected 4.3.0 – < 4.3.0.112
- affected 4.4.0 – < 4.4.0.72
- affected 4.5.0 – < 4.5.0.55
- affected 4.6.0 – < 4.6.0.17
- unknown < 4.5.0
- affected 4.5.0 – < 4.5.0.56
- affected 4.6.0 – < 4.6.0.18
- unknown < 4.5.0
- affected 4.5.0 – < 4.5.0.55
- affected 4.6.0 – < 4.6.0.17
- unknown < 4.5.0
- affected 4.5.0 – < 4.5.0.54
- affected 4.6.0 – < 4.6.0.17
- unknown < 5.10.0
- affected 5.10.0 – < 5.10.0.383
- affected 5.11.0 – < 5.11.0.430
- affected 6.0.0 – < 6.0.0.257
- affected 6.1.0 – < 6.1.0.234
- affected 6.1.0 – < 6.1.0.257
- affected 7.0.0 – < 7.0.0.133
- affected 7.1.0 – < 7.1.0.41
- affected 7.2.0 – < 7.2.0.3
WSO2 · WSO2 Identity Server as Key Manager
- unknown < 5.10.0
- affected 5.10.0 – < 5.10.0.374
- unknown < 2.0.0
- affected 2.0.0 – < 2.0.0.403
- unknown < 2.0.0
- affected 2.0.0 – < 2.0.0.423
WSO2 · WSO2 Carbon Identity Management Endpoint Util
- affected 5.17.5 – < 5.17.5.332
- affected 5.18.187 – < 5.18.187.330
- affected 5.23.8 – < 5.23.8.213
- affected 5.25.92 – < 5.25.92.167
- affected 7.0.78 – < 7.0.78.162
- unaffected x – ≤ *
WSO2 · WSO2 Carbon Identity Application Authentication Framework
- affected 5.17.5 – < 5.17.5.332
- affected 5.18.187 – < 5.18.187.330
- unaffected x – ≤ *
What to do
Solution: Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4227/#solution
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-210910 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-5802)Record last updated .