CVE-2021-42342
This permits tunneling untrusted environment variables into vulnerable CGI scripts.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 59.5%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 59.46% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- embedthis/goahead
- Source
- cve@mitre.org
EPSS 59.5% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/embedthis/goahead/issues/305Third Party Advisory
- https://github.com/embedthis/goahead/issues/305Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.