CVE-2021-33558

7.5 highEPSS 12%

High (7.5) in boa boa. EPSS 12% chance of exploitation in the next 30 days.

Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js, log.html, email.html, online-users.html, and config.js. NOTE: multiple third parties report that this is a site-specific issue because those files are not part of Boa.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 12% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)
Published: 2021-05-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

boa:boa

References

https://github.com/mdanzaruddin/CVE-2021-33558.
https://github.com/mdanzaruddin/CVE-2021-33558./issues/1
https://sourceforge.net/projects/boa/files/boa/0.94.13/
https://github.com/mdanzaruddin/CVE-2021-33558.
https://github.com/mdanzaruddin/CVE-2021-33558./issues/1

Check your stack JSON