CVE-2023-1717

Bitrix24 Cross-Site Scripting (XSS) via Client-side Prototype Pollution

Prototype pollution in bitrix/templates/bitrix24/components/bitrix/menu/left_vertical/script.js in Bitrix24 22.0.300 allows remote attackers to execute arbitrary JavaScript code in the victim’s browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege, via polluting `__proto__[tag]` and `__proto__[text]`.

Affected

Bitrix24

CVSS v3.1 NVD

9.6 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS

1.05% chance of exploitation in the next 30 days, 64th percentile

Published

2023-11-01

Updated

2024-09-05

Proof-of-concept exploits (1)

• https://starlabs.sg/advisories/23/23-1717/

Security advisories

• https://starlabs.sg/advisories/23/23-1717

References

• CVE Record
• NVD entry