CVE-2025-71323 (CVSS 9.8)

Description

picklescan before 0.0.33 fails to block the ctypes module, allowing attackers to achieve remote code execution by invoking direct syscalls and accessing raw memory. Attackers can craft malicious pickle files using ctypes.WinDLL to load kernel32.dll and execute arbitrary commands, bypassing sandbox protections and gadget chain detection.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0076

Probability of exploitation

0.51%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-184 CWE-184

References

Other References

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-4675-36f9-wf6r https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-unblocked-ctypes-module https://github.com/mmaitre314/picklescan/security/advisories/GHSA-4675-36f9-wf6r

Frequently Asked Questions

What is CVE-2025-71323? +

picklescan before 0.0.33 fails to block the ctypes module, allowing attackers to achieve remote code execution by invoking direct syscalls and accessing raw memory. Attackers can craft malicious pickle files using ctypes.WinDLL to load kernel32.dll and execute arbitrary commands, bypassing sandbox protections and gadget chain detection. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-71323? +

CVE-2025-71323 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0076, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2025-71323? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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