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THREATINT
PUBLISHED

CVE-2023-1720

Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload



AssignerSTAR_Labs
Reserved2023-03-30
Published2023-11-01
Updated2024-09-05

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.



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

Problem types

CWE-434 Unrestricted Upload of File with Dangerous Type

Product status

Default status
0x4001240010

Any version
affected

Credits

Lam Jun Rong & Li Jiantao of STAR Labs SG Pte. Ltd. (@starlabs_sg) 0x4001240070

References

https://starlabs.sg/advisories/23/23-1720/ third-party-advisory

cve.org CVE-2023-1720

nvd.nist.gov CVE-2023-1720

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