CVE-2023-1720

Bitrix24 vulnerability

9.6 CRITICALEPSS 0.85%

Published1 Nov 2023

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionRequired

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Bitrix2422.0.300

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Frequently asked

Is CVE-2023-1720 being actively exploited?

CVE-2023-1720 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.85%.

How severe is CVE-2023-1720?

CVE-2023-1720 has a CVSS 3.1 base score of 9.6, rated critical. EPSS estimates a 0.85% probability of exploitation.

Which products are affected by CVE-2023-1720?

Affected products include Bitrix24.

How do I fix CVE-2023-1720?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-1720 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.