CVE-2023-1720 json
Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload
published 2023-11-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-23943
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- starlabs.sg https://starlabs.sg/advisories/23/23-1720/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 8.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
Affected products
- Bitrix24 Bitrix24
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
starlabs.sg
/advisories/23/23-1720/
third-party-advisory, exploit
Sources
- CVE List CVE-2023-1720
- NVD CVE-2023-1720
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