What is CVE-2023-1717?

CVE-2023-1717 is a critical-severity vulnerability in Bitrix24, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2023-11-01.

How severe is CVE-2023-1717?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Is CVE-2023-1717 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Bitrix24

CVE-2023-1717

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]`.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.011 (60.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Bitrix24 — versions 22.0.300, 0

Weakness classification (CWE)

Public proof-of-concept exploits

References

info@starlabs.sg (Exploit, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2023-1717?: CVE-2023-1717 is a critical-severity vulnerability in Bitrix24, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2023-11-01.
How severe is CVE-2023-1717?: Critical severity. CVSS v3 base score is 9.6 out of 10.
Is CVE-2023-1717 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.