Kaseya < 6.3.0.2 uploadImage.asp Arbitrary File Upload RCE
Published Jul 31, 2025
9.3
CRITICALCVSS 4.0
EPSS 2.65%
Description
An unrestricted file upload vulnerability exists in Kaseya KServer versions prior to 6.3.0.2. The uploadImage.asp endpoint allows unauthenticated users to upload files to arbitrary paths via a crafted filename parameter in a multipart/form-data POST request. Due to the lack of authentication and input sanitation, an attacker can upload a file with an .asp extension to a web-accessible directory, which can then be invoked to execute arbitrary code with the privileges of the IUSR account. The vulnerability enables remote code execution without prior authentication and was resolved in version 6.3.0.2 by removing the vulnerable uploadImage.asp endpoint.
Affected products
-
- Version 0StatusaffectedConstraints<6.3.0.2
- Version
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Jul 31, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.65% (0.02651) | 85.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.29% (0.02289) | 80.89th | v5 (v2026.06.15) |
| Jun 8, 2026 | 55.13% (0.55130) | 98.10th | v4 (v2025.03.14) |
| May 27, 2026 | 51.41% (0.51411) | 97.92th | v4 (v2025.03.14) |
| Nov 30, 2025 | 41.33% (0.41333) | 97.24th | v4 (v2025.03.14) |
| Nov 3, 2025 | 38.10% (0.38096) | 97.06th | v4 (v2025.03.14) |
| Oct 21, 2025 | 33.60% (0.33602) | 96.71th | v4 (v2025.03.14) |
| Oct 17, 2025 | 31.30% (0.31296) | 96.52th | v4 (v2025.03.14) |
| Oct 8, 2025 | 38.10% (0.38096) | 97.03th | v4 (v2025.03.14) |
| Aug 1, 2025 | 0.52% (0.00519) | 65.97th | v4 (v2025.03.14) |
References (4)
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/kaseya_uploadimage_file_upload.rb exploit
- https://web.archive.org/web/20150210113922/http://security-assessment.com/files/documents/advisory/Kaseya%20File%20Upload.pdf third-party-advisorytechnical-descriptionexploit
- https://www.exploit-db.com/exploits/29675 exploit
- https://www.vulncheck.com/advisories/kaseya-arbitrary-file-upload-rce third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/kaseya_uploadimage_file_upload.rb | exploit | |
| https://web.archive.org/web/20150210113922/http://security-assessment.com/files/documents/advisory/Kaseya%20File%20Upload.pdf | third-party-advisorytechnical-descriptionexploit | |
| https://www.exploit-db.com/exploits/29675 | exploit | |
| https://www.vulncheck.com/advisories/kaseya-arbitrary-file-upload-rce | third-party-advisory |
Change history (0)
No recorded changes yet.