What’s Vulnerable › Vulnerabilities

CVE-2020-15131: False-positive validity for NFT1 genesis transactions in SLP Validate

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-30 · updated 2026-06-17
• Weakness: CWE-697

Description

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

How to fix

Upgrade to a fixed version: simpleledger slp-validate 1.2.2. Check the vendor advisory for mitigations.

References

• https://github.com/simpleledger/slp-validate.js/commit/3963cf914afae69084059b82483da916d97af65c
• https://github.com/simpleledger/slp-validate.js/security/advisories/GHSA-6jmr-jfh7-xg3h
• https://github.com/simpleledger/slp-validate.js/commit/3963cf914afae69084059b82483da916d97af65c
• https://github.com/simpleledger/slp-validate.js/security/advisories/GHSA-6jmr-jfh7-xg3h

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