CVE-2016-9646: Commit metadata forgery via CGI::FormBuilder context-dependent APIs

Severity: medium (CVSS 5.3 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-04-13 · updated 2026-06-17
Weakness: CWE-287

Description

ikiwiki before 3.20161229 incorrectly called the CGI::FormBuilder->field method (similar to the CGI->param API that led to Bugzilla's CVE-2014-1572), which can be abused to lead to commit metadata forgery.

Affected products

Debian Linux: 7.0, 8.0, 9.0
ikiwiki: before 3.20161229 — fixed in 3.20161229

How to fix

Upgrade to a fixed version: ikiwiki 3.20161229. Check the vendor advisory for mitigations.

References

https://ikiwiki.info/security/#cve-2016-9646
https://marc.info/?l=oss-security&m=148304341511854&w=2
https://security-tracker.debian.org/tracker/CVE-2016-9646
https://www.debian.org/security/2017/dsa-3760
https://ikiwiki.info/security/#cve-2016-9646
https://marc.info/?l=oss-security&m=148304341511854&w=2
https://security-tracker.debian.org/tracker/CVE-2016-9646
https://www.debian.org/security/2017/dsa-3760

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