CVE-2023-1720

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

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.

Category

9.6
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 1.02% Top 25%
Third-Party Advisory starlabs.sg
Affected: Bitrix24 Bitrix24
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2023-1720?
CVE-2023-1720 has been scored as a critical severity vulnerability.
How to fix CVE-2023-1720?
To fix CVE-2023-1720, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-1720 being actively exploited in the wild?
It is possible that CVE-2023-1720 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-1720?
CVE-2023-1720 affects Bitrix24 Bitrix24.
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