#VU105920 Arbitrary file upload in Sunny Portal - CVE-2025-0731

Vulnerability identifier: #VU105920

Vulnerability risk: High

CVSSv4.0: 8.1 [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:U/U:Amber]

CVE-ID: CVE-2025-0731

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Sunny Portal
Client/Desktop applications / Other client software

Vendor: SMA Solar Technology AG

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload. A remote attacker can upload a .aspx file instead of a PV system picture through the demo account and execute it on the server.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Sunny Portal: before 19.12.2024

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External links
https://cert.vde.com/en/advisories/VDE-2025-012
https://www.cisa.gov/news-events/ics-advisories/icsa-25-079-04

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.