CVE-2024-45394

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: <0.1% (below the 1st percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: <0.1%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Authenticator is a browser extension that generates two-step verification codes. In versions 7.0.0 and below, encryption keys for user data were stored encrypted at-rest using only AES-256 and the EVP_BytesToKey KDF. Therefore, attackers with a copy of a user's data are able to brute-force the user's encryption key. Users on version 8.0.0 and above are automatically migrated away from the weak encoding on first login. Users should destroy encrypted backups made with versions prior to 8.0.0.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
<0.1%
EPSS %ILE
below the 1st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 3, 2024

Last Modified

October 9, 2024

Advisory Details (2)

Auto-updated Aug 23, 2026
Patch available. Sources: github_commit, github.
githubMentions a patch (unverified)

Secret encryption vulnerable to brute-force attacks · Advisory · Authenticator-Extension/Authenticator · GitHub

https://github.com/Authenticator-Extension/Authenticator/security/advisories/GHSA-gv8m-vgp8-q2xr
github_commit Patch Available

commit 17aa2068553d (Authenticator-Extension/Authenticator)

Patch available: Authenticator-Extension/Authenticator v8.0.0 (contains commit 17aa2068553d)

https://github.com/Authenticator-Extension/Authenticator/commit/17aa2068553db3c3aac081c9ffe393536f33b28b

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 25× 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 137 total refreshes for this CVE.

  1. 2026-10-10 00:33 UTCOSV refresh
  2. 2026-10-08 17:08 UTCEPSS rescore
  3. 2026-10-07 23:46 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2024-45394?
CVE-2024-45394 is a high vulnerability published on September 3, 2024. Authenticator is a browser extension that generates two-step verification codes. In versions 7.0.0 and below, encryption keys for user data were stored encrypted at-rest using only AES-256 and the EVP_BytesToKey KDF. Therefore, attackers with a copy of a user's data are able to brute-force the…
When was CVE-2024-45394 disclosed?
CVE-2024-45394 was first published on September 3, 2024, with the most recent update on October 9, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-45394 actively exploited?
CVE-2024-45394 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a <0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-45394?
CVE-2024-45394 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2024-45394?
A fix for CVE-2024-45394 is available: update to the fixed version the vendor names in its advisory.

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