What is CVE-2023-1718?

CVE-2023-1718 is a high-severity vulnerability in Bitrix24, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2023-11-01.

How severe is CVE-2023-1718?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-1718 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Bitrix24

CVE-2023-1718

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".

Published 2023-11-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.241 (97.8th percentile), scored 2026-10-01.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.241 · newest: 0.241 · change: 0.000

Affected products

Bitrix24 — versions 22.0.300, 0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

Public proof-of-concept exploits

References

starlabs.sg/advisories/23/23-1718/ (Exploit, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2023-1718?: CVE-2023-1718 is a high-severity vulnerability in Bitrix24, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2023-11-01.
How severe is CVE-2023-1718?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-1718 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.