CVE-2023-1717

9.6 criticalEPSS 1.1%

Critical (9.6) in bitrix24 bitrix24. EPSS 1.1% chance of exploitation in the next 30 days.

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]`.

Severity

CVSS 3.1

9.6 critical

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

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 64% of CVEs (scores of 2026-10-31)
CWEs: CWE-79, CWE-1321
Published: 2023-11-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

bitrix24:bitrix24

References

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

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