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Findings

Vulnerability · CVE-2021-44892

ThinkPHP '_filename' in index.php Remote Code Execution

Published Jul 15, 2024 · corrected/updated Jul 15, 2024 · ThinkPHP ThinkPHP · evidence confidence very high

A Remote Code Execution (RCE) vulnerability exists in ThinkPHP 3.x.x via value[_filename] in index.php, which could let a malicious user obtain server control privileges.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2021-44892 is a unknown public vulnerability record for ThinkPHP ThinkPHP. CISA lists it as known exploited. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether ThinkPHP ThinkPHP is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: ThinkPHP ThinkPHP. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: no CVSS/EPSS yet. CISA lists it as known exploited. Sources contributing to this record: vulncheck_kev. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Confirmed in CISA KEV since Jul 15, 2024. Listed in CISA KEV and VulnCheck KEV.

  • Patch and remediation

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 15, 2024 · VulnCheck KEV

    Detected

    A Remote Code Execution (RCE) vulnerability exists in ThinkPHP 3.x.x via value[_filename] in index.php, which could let a malicious user obtain server control privileges.

  2. Jul 15, 2024 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected

  • vendor ThinkPHP ThinkPHPversion unspecified

Sources

  • VulnCheck KEVConfirmed exploitationCVE-2021-44892

    A Remote Code Execution (RCE) vulnerability exists in ThinkPHP 3.x.x via value[_filename] in index.php, which could let a malicious user obtain server control privileges.

    vulncheck.com

References