CVE-2024-45489

critical

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.

References

https://www.bleepingcomputer.com/news/security/arc-browser-launches-bug-bounty-program-after-fixing-rce-bug/

https://news.ycombinator.com/item?id=41597250

https://kibty.town/blog/arc/

https://arc.net/blog/CVE-2024-45489-incident-response

Details

Source: Mitre, NVD

Published: 2024-09-20

Updated: 2026-04-15

Risk Information

CVSS v2

Base Score: 8.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.00572