Public proof of conceptFix available

CVE-2024-45489

Q: Is CVE-2024-45489 actively exploited?

A proof-of-concept exploit exists for CVE-2024-45489, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2024-45489?

CVE-2024-45489 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2024-09-20
Fixed in2024-08-26
WeaknessCWE-284

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Arc before 2024-08-26 allows remote code execution in JavaScript boosts. Boosts that run JavaScript cannot be shared by default; however (because of misconfigured Firebase ACLs), it is possible to create or update a boost using another user's ID. This installs the boost in the victim's browser and runs arbitrary Javascript on that browser in a privileged context. NOTE: this is a no-action cloud vulnerability with zero affected users.

Timeline

dates in UTC

2024-09-2017:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-45489?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-45489?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP

The browser company arc

Branch	Affected	Fixed in	Source
2024.x	< 2024-08-26	2024-08-26	CISA-ADP

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update The browser company arc to 2024-08-26

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionpoc2024-09-20
OpenCVESSVC decisionpoc—
CISA-ADPCVSS 3.19.82024-09-20
CISA-ADPweakness (CWE)CWE-2842024-09-20
FIRST EPSSEPSS score1.2 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2024-09-20
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2024-45489?

Is CVE-2024-45489 actively exploited?

A proof-of-concept exploit exists for CVE-2024-45489, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2024-45489?

CVE-2024-45489 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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