Microweber up to 2.0.20 API Endpoint thumbnail_img userfiles_path cache_path_relative path traversal

Summaryinfo

A vulnerability identified as critical has been detected in Microweber up to 2.0.20. This impacts the function userfiles_path of the file /api_nosession/thumbnail_img of the component API Endpoint. The manipulation of the argument cache_path_relative leads to path traversal. This vulnerability is documented as CVE-2026-12198. The attack can be initiated remotely. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in Microweber up to 2.0.20 and classified as critical. This issue affects the function userfiles_path of the file /api_nosession/thumbnail_img of the component API Endpoint. The manipulation of the argument cache_path_relative with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-12198. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The exploit is available at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Microweber

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8
• 2.0.9
• 2.0.10
• 2.0.11
• 2.0.12
• 2.0.13
• 2.0.14
• 2.0.15
• 2.0.16
• 2.0.17
• 2.0.18
• 2.0.19
• 2.0.20

License

• open-source

Website

• Product: https://github.com/microweber/microweber/

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #829596: Microweber 2.0.20 Path Traversal (by TarryHou)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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