Vulnerability · Published Nov 1, 2023 · Assigned by STAR_Labs
CVE-2023-1720Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload
Critical 9.6
In plain English
A critical-severity unrestricted file upload in Bitrix24 from Bitrix24. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities).
Severity (CVSS 3.1)9.6Critical
Exploit odds (30 days)1.1%top 33.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Lack of mime type response header in Bitrix24 22.0.300 allows authenticated 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 uploading a crafted HTML file through /desktop_app/file.ajax.php?action=uploadfile.
Affected products (as reported)
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
References
- https://starlabs.sg/advisories/23/23-1720/ third-party-advisory