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TI-2023-01612 Aliases CVE-2023-1718GHSA-qx86-33ww-3474

Bitrix24 Denial-of-Service (DoS) via Improper File Stream Access

Priority HIGH 72CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-835.

Summary

Improper file stream access in /desktop_app/file.ajax.php?action=uploadfile in Bitrix24 22.0.300 allows unauthenticated remote attackers to cause denial-of-service via a crafted "tmp_url".

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.28693 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Bitrix24Bitrix24up to 22.0.300—No fix listedCNA
  • Bitrix24 VendorBitrix24 Affected up to 22.0.300 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:bitrix24:bitrix24:22.0.300:*:*:*:*:*:*:*22.0.300VulnerableBitrix24
  • cpe:2.3:a:bitrix24:bitrix24:22.0.300:*:*:*:*:*:*:* Versions 22.0.300 Vulnerable ·Bitrix24

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1718
  2. 2026-10-03 Alias added: GHSA-qx86-33ww-3474

References

Exploit 1

  • TI-2023-01613 Bitrix24 Insecure Global Variable Extraction CVSS 3.1CRITICAL 9.8
  • TI-2023-01614 Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload CVSS 3.1CRITICAL 9.6
  • TI-2023-01611 Bitrix24 Cross-Site Scripting (XSS) via Client-side Prototype Pollution CVSS 3.1CRITICAL 9.6
  • TI-2023-01608 Bitrix24 Remote Command Execution (RCE) via Unsafe Variable Extraction CVSS 3.1HIGH 8.8
  • TI-2023-01607 Bitrix24 Remote Command Execution (RCE) via Insecure Temporary File Creation CVSS 3.1HIGH 8.8
  • TI-2024-23125 Insufficiently protected credentials in DAV server settings in 1C-Bitrix Bitrix24… CVSS 3.1MEDIUM 6.8
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences