CVE-2021-24040

CRITICAL

Facebook Parlai < 1.1.0 - Insecure Deserialization

Title source: rule

Description

Due to use of unsafe YAML deserialization logic, an attacker with the ability to modify local YAML configuration files could provide malicious input, resulting in remote code execution or similar risks. This issue affects ParlAI prior to v1.1.0.

Exploits (1)

exploitdb WORKING POC

by Abhiram V · pythonlocalpython

https://www.exploit-db.com/exploits/50289

View Code ZIP pw:eip

References (3)

[Exploit, Third Party Advisory, VDB Entry] http://packetstormsecurity.com/files/164136/Facebook-ParlAI-1.0.0-Code-Execution-Deserialization.html

[Release Notes, Third Party Advisory] https://github.com/facebookresearch/ParlAI/releases/tag/v1.1.0

[Patch, Third Party Advisory] https://github.com/facebookresearch/ParlAI/security/advisories/GHSA-m87f-9fvv-2mgg

Scores

CVSS v3 9.8

EPSS 0.3624

EPSS Percentile 97.0%

Attack Vector NETWORK

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

Classification

CWE

CWE-502

Status published

Affected Products (2)

facebook/parlai < 1.1.0

pypi/parlai < 1.1.0PyPI

Timeline

Published Sep 10, 2021

Tracked Since Feb 18, 2026