CVE-2024-57727

CVE-2024-57727: SimpleHelp Unauthenticated Path Traversal Enables Arbitrary File Download

AI-generated analysis based on the vulnerability data on this page.

Summary

SimpleHelp remote support software v5.5.7 and before is vulnerable to multiple path traversal flaws that allow unauthenticated remote attackers to download arbitrary files from the SimpleHelp host via crafted HTTP requests. Exposed files include server configuration files containing secrets and hashed user passwords.

Background

SimpleHelp is a remote support and remote access software solution used by IT support teams and managed service providers (MSPs) to connect to endpoints. Because the software typically runs on internet-facing servers and handles sensitive authentication data, vulnerabilities in its web-facing components carry high defensive priority.

Root Cause

CWE-22 — Improper Limitation of a Pathname to a Restricted Directory (‘Path Traversal’)

The application fails to adequately sanitize user-supplied path components in HTTP requests. Attackers can inject directory traversal sequences (e.g., ../) to escape intended file-access boundaries and request files located outside the permitted directory. The presence of multiple path traversal endpoints suggests a systemic lack of input validation across the web interface rather than a single isolated bug.

Impact

The CVSS v3.1 score of 7.5 (HIGH) reflects a confidentiality-focused impact:

• Attack Vector (AV): Network — exploitable remotely without local network access.
• Attack Complexity (AC): Low — no special conditions or advanced techniques required.
• Privileges Required (PR): None — fully unauthenticated.
• User Interaction (UI): None — no victim action needed.
• Scope (S): Unchanged — the vulnerable component is the target.
• Confidentiality (C): High — sensitive data is exposed.
• Integrity (I): None / Availability (A): None — no direct write or denial-of-service impact per the vector.

Successful exploitation exposes server configuration files, secrets, and hashed user passwords, enabling credential recovery and lateral movement.

Exploitation Walkthrough

Ethics caveat: This section describes the vulnerability mechanism from a defensive perspective to aid detection and mitigation. No weaponized exploit code is provided. Use this information only for authorized hardening and incident response.

An attacker sends crafted HTTP requests to SimpleHelp endpoints that accept file or path parameters. By embedding traversal sequences in these parameters, the attacker bypasses the intended directory restriction and causes the server to return files such as:

• Server configuration files
• Files containing hashed user credentials
• Other secrets stored on the host

Because the flaw is unauthenticated and requires only network access, automated scanners and opportunistic actors can discover and exploit it at scale. The EPSS score of 0.95151 and inclusion in the CISA KEV catalog confirm active exploitation in the wild.

Affected and Patched Versions

• Affected: SimpleHelp v5.5.7 and earlier
• Patched: Specific fixed version is not disclosed in the available data; consult the vendor’s security advisory for the latest patched release.

Administrators should verify their installed version and upgrade to the latest release provided by SimpleHelp.

Remediation

1. Upgrade immediately. Apply the latest vendor patch as soon as it is available. Because this CVE is actively exploited and listed in the KEV catalog, patching urgency is high.
2. Compensating controls until patched:
   • Restrict network access to the SimpleHelp server using VPNs, IP allow-listing, or a Web Application Firewall (WAF).
   • Block or monitor for traversal patterns (../, %2e%2e%2f, and encoded variants) in HTTP request parameters at the WAF or reverse-proxy layer.
   • Disable or place the SimpleHelp instance behind an authenticated access gateway if remote access is not immediately required.
3. Post-incident: Rotate all secrets and credentials stored in the SimpleHelp configuration after patching, assuming compromise if the instance was internet-facing during the exposure window.

Detection

• WAF/Proxy logs: Monitor HTTP requests containing path traversal patterns in query strings, path segments, or body parameters targeting SimpleHelp endpoints.
• File-access monitoring: Alert on unexpected read events for sensitive server configuration files by the SimpleHelp application process.
• Network traffic: Unusual outbound data transfers from the SimpleHelp server may indicate bulk file exfiltration.
• CISA KEV: Because this vulnerability is listed in the Known Exploited Vulnerabilities catalog, ensure it is included in vulnerability scanning and ticketing workflows.

Assessment

This CVE is a textbook example of a high-impact, low-complexity flaw in internet-facing administrative software. The EPSS of 0.95151 (99.85th percentile) indicates that exploitation probability is extremely high, which aligns with its KEV and EU-exploited status. Its use in ransomware campaigns further elevates risk.

Key lessons:

1. Path traversal is a recurring systemic failure. When one traversal endpoint is found, audit the entire application surface for the same pattern rather than fixing a single instance.
2. KEV + high EPSS = treat as breached. Organizations running affected SimpleHelp versions should prioritize patching and assume that credentials stored on the server may require rotation.

References

• https://simple-help.com/kb---security-vulnerabilities-01-2025#security-vulnerabilities-in-simplehelp-5-5-7-and-earlier
• https://www.horizon3.ai/attack-research/disclosures/critical-vulnerabilities-in-simplehelp-remote-support-software/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-57727