CVE-2023-33241

CRITICALNVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2023-08-10. NVD baseline CVSS 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Crypto wallets implementing the GG18 or GG20 TSS protocol might allow an attacker to extract a full ECDSA private key by injecting a malicious pallier key and cheating in the range proof. Depending on the Beta parameters chosen in the protocol implementation, the attack might require 16 signatures or more fully exfiltrate the other parties' private key shares.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity96% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
59.7%
KEV
Not listed

Published

August 9, 2023

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Jul 15, 2026
No patch confirmed yet.
generic

GG18 and GG20 Paillier Key Vulnerability [CVE-2023-33241]: Technical Report | Fireblocks

https://www.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-report/
generic

GitHub - fireblocks-labs/safeheron-gg20-exploit-poc · GitHub

https://github.com/fireblocks-labs/safeheron-gg20-exploit-poc
generic

GitHub - fireblocks-labs/mpc-ecdsa-attacks-23 · GitHub

https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-07-23 14:16 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-33241?
CVE-2023-33241 is a critical vulnerability published on August 9, 2023. Crypto wallets implementing the GG18 or GG20 TSS protocol might allow an attacker to extract a full ECDSA private key by injecting a malicious pallier key and cheating in the range proof. Depending on the Beta parameters chosen in the protocol implementation, the attack might require 16 signatures…
When was CVE-2023-33241 disclosed?
CVE-2023-33241 was first published in the National Vulnerability Database on August 9, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-33241 actively exploited?
CVE-2023-33241 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 59.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-33241?
CVE-2023-33241 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2023-33241?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-33241, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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