CVE-2020-21493 json
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate usernames.
published 2021-10-04 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-14263
- cvss
- 5.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 62%
- public exploits
- 0
- none known
Summary
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate usernames.
Exploit prediction
1.00% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/wanghaiwei/xiuno-docker/issues/3 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
References
-
github.com
/wanghaiwei/xiuno-docker/issues/3
exploit, issue-tracking, third-party-advisory
-
gitee.com
/xiuno/xiunobbs/issues/I1690W
issue-tracking, third-party-advisory
Sources
- CVE List CVE-2020-21493
- NVD CVE-2020-21493
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.