# CVE-2025-24800

## Summary

- **CVE ID:** CVE-2025-24800
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-670, CWE-347
- **Published:** Jan 28, 2025
- **Last Modified:** Mar 12, 2026

## Description

Hyperbridge is a hyper-scalable coprocessor for verifiable, cross-chain interoperability. A critical vulnerability was discovered in the ismp-grandpa crate, that allowed a malicious prover easily convince the verifier of the finality of arbitrary headers. This could be used to steal funds or compromise other kinds of cross-chain applications. This vulnerability is fixed in 15.0.1.

## Affected Products

- polytope-labs — hyperbridge (< 15.0.1)

## References

- [CNA](https://github.com/polytope-labs/hyperbridge/security/advisories/GHSA-wwx5-gpgr-vxr7)
- [CNA](https://github.com/polytope-labs/hyperbridge/pull/372/commits/f0e85db718f5165b06585a49b14a66f8ad643aea)
- [CNA](https://github.com/polytope-labs/ismp-substrate/pull/64/commits/5ca3351a19151f1a439c30d5cbdbfdc72a11f1a8#diff-3835cc24fb2011b3e8246036059acd8c2c2a9a869eedf7a210d18edb6543318dL262)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.32%
- **EPSS Percentile:** 24.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._