What’s Vulnerable › Vulnerabilities

CVE-2021-23682: Prototype Pollution

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-02-16 · updated 2026-06-17
• Weakness: CWE-1321

Description

This affects the package litespeed.js before 0.3.12; the package appwrite/server-ce from 0.12.0 and before 0.12.2, before 0.11.1. When parsing the query string in the getJsonFromUrl function, the key that is set in the result object is not properly sanitized leading to a Prototype Pollution vulnerability.

Affected products

• appwrite/appwrite: before 0.11.1; from 0.12.0 before 0.12.2 — fixed in 0.11.1, 0.12.2
• Litespeed.Js Project Litespeed.Js: before 0.3.12 — fixed in 0.3.12

How to fix

Upgrade to a fixed version: appwrite/appwrite 0.11.1, 0.12.2; Litespeed.Js Project Litespeed.Js 0.3.12. Check the vendor advisory for mitigations.

References

• https://github.com/appwrite/appwrite/pull/2778
• https://github.com/appwrite/appwrite/releases/tag/0.11.1
• https://github.com/appwrite/appwrite/releases/tag/0.12.2
• https://github.com/litespeed-js/litespeed.js/pull/18
• https://snyk.io/vuln/SNYK-JS-LITESPEEDJS-2359250
• https://snyk.io/vuln/SNYK-PHP-APPWRITESERVERCE-2401820
• https://github.com/appwrite/appwrite/pull/2778
• https://github.com/appwrite/appwrite/releases/tag/0.11.1
• https://github.com/appwrite/appwrite/releases/tag/0.12.2
• https://github.com/litespeed-js/litespeed.js/pull/18
• https://snyk.io/vuln/SNYK-JS-LITESPEEDJS-2359250
• https://snyk.io/vuln/SNYK-PHP-APPWRITESERVERCE-2401820

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