CVE-2020-21493
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate...
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate usernames.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate usernames.
- Record
CVE-2020-21493- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate usernames.
- Record
CVE-2020-21493- Updated
- 2026-11-02
EUVDEUVD-2020-14263 No score
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate usernames.
- Record
EUVD-2020-14263- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4hxw-v2j3-4qv8 No score
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate...
An issue in the component route\user.php of Xiuno BBS v4.0.4 allows attackers to enumerate usernames.
- Record
GHSA-4hxw-v2j3-4qv8- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-21493 is a medium vulnerability (CVSS 5.3) in Xiuno Xiunobbs, published October 4, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.00%, the 62nd percentile. No source names a fixed version.