CVE-2020-15131: Simpleledger SLP-Validate

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

In SLP Validate (npm package slp-validate) before version 1.2.2, there is a vulnerability to false-positive validation outcomes for the NFT1 Child Genesis transaction type. A poorly implemented SLP wallet or opportunistic attacker could create a seemingly valid NFT1 child token without burning any of the NFT1 Group token type as is required by the NFT1 specification. This is fixed in version 1.2.2.

Affected products

• Simpleledger SLP-Validate: before 1.2.2 (fixed in 1.2.2)

Published 2020-07-30. Last modified 2026-06-17.