CVE-2021-42342 in the critical feed json
An issue was discovered in GoAhead 4.x and 5.x before 5.1.5.
published 2021-10-14 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29315
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 59.5%
- EPSS 59.5% chance of exploitation in 30 days, percentile 99.1%
- public exploits
- 0
- none known
Summary
An issue was discovered in GoAhead 4.x and 5.x before 5.1.5. In the file upload filter, user form variables can be passed to CGI scripts without being prefixed with the CGI prefix. This permits tunneling untrusted environment variables into vulnerable CGI scripts.
Patch / fix
- embedthis goahead 5.1.5
Exploit prediction
59.46% chance of exploitation in the next 30 days, higher than 99.1% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
github.com
/embedthis/goahead/issues/305
third-party-advisory
Sources
- CVE List CVE-2021-42342
- NVD CVE-2021-42342
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.