GHSA-425c-ccf3-3jrr is a medium-severity (CVSS 5.7) Improper Input Validation vulnerability in slpjs. 1 public exploit reference exists, so weaponization risk is real. O3 Security confirms whether GHSA-425c-ccf3-3jrr is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Critical severity vulnerability that affects slpjs
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
slpjsnpmDescription
Validator parsing discrepancy due to string encoding
Impact
A specially crafted Bitcoin script can cause a discrepancy between the specified SLP consensus rules and the validation result of the slpjs npm package. An attacker could create a specially crafted Bitcoin script in order to cause a hard-fork from the SLP consensus.
Patches
All versions > 0.21.3 are patched.
Workarounds
Upgrade to any version >= 0.21.4.
References
The bug was located and fixed here.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the slpjs repo
- Email us at [email protected]
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | slpjs | all versions | 0.21.4 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for slpjs. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update slpjs to 0.21.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-425c-ccf3-3jrr is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-425c-ccf3-3jrr is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-425c-ccf3-3jrr. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-425c-ccf3-3jrr in your dependencies?
O3 detects GHSA-425c-ccf3-3jrr across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.