CVE-2025-27611: Cryptocoinjs Base-X

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

base-x is a base encoder and decoder of any given alphabet using bitcoin style leading zero compression. Versions 4.0.0, 5.0.0, and all prior to 3.0.11, are vulnerable to attackers potentially deceiving users into sending funds to an unintended address. This issue has been patched in versions 3.0.11, 4.0.1, and 5.0.1.

Affected products

• Cryptocoinjs Base-X: version 5.0.0 only; version 4.0.0 only; before 3.0.11 (fixed in 3.0.11)

Published 2025-04-30. Last modified 2026-06-17.