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Vulnerability DatabaseCVE-2025-65849

CVE-2025-65849: 
JavaScript vulnerability analysis and mitigation

A cryptanalytic break in Altcha Proof-of-Work obfuscation mode version 0.8.0 and later allows for remote visitors to recover the Proof-of-Work nonce in constant time via mathematical deduction.

Source: NVD

Related JavaScript vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-66456CRITICAL9.1
  • JavaScriptJavaScript
  • elysia
NoYesDec 09, 2025
CVE-2025-66457HIGH7.5
  • JavaScriptJavaScript
  • elysia
NoYesDec 09, 2025
CVE-2025-65849MEDIUM6.9
  • JavaScriptJavaScript
  • altcha
NoNoDec 08, 2025
CVE-2025-66202MEDIUM6.5
  • JavaScriptJavaScript
  • astro
NoYesDec 09, 2025
CVE-2025-14284MEDIUM5.1
  • JavaScriptJavaScript
  • @tiptap/extension-link
NoYesDec 09, 2025

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