CVE-2021-33558 in the critical feed json
Boa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js,…
published 2021-05-27 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-20250
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 12.3%
- EPSS 12.3% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
12.31% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Boa 0.94.13 - Information Disclosure nuclei detection template
- github.com https://github.com/mdanzaruddin/CVE-2021-33558. referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
References
-
github.com
/mdanzaruddin/CVE-2021-33558.
exploit, third-party-advisory
-
sourceforge.net
/projects/boa/files/boa/0.94.13/
release-notes, third-party-advisory
-
github.com
/mdanzaruddin/CVE-2021-33558./issues/1
issue-tracking, third-party-advisory
Sources
- CVE List CVE-2021-33558
- NVD CVE-2021-33558
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.