Microweber CMS Authenticated Local File Inclusion via Backup API
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
An authenticated local file inclusion vulnerability exists in Microweber CMS versions <= 1.2.11 through misuse of the backup management API. Authenticated users can abuse the /api/BackupV2/upload and /api/BackupV2/download endpoints to read arbitrary files from the underlying filesystem. By specifying an absolute file path in the src parameter of the upload request, the server may relocate or delete the target file depending on the web service user’s privileges. The corresponding download endpoint can then be used to retrieve the file contents, effectively enabling local file disclosure. This behavior stems from insufficient validation of user-supplied paths and inadequate restrictions on file access and backup logic.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| microweber | CMS | up to 1.2.11 | — | No fix listed | CNA |
| — | microweber/microweber (Packagist) | before 1.2.11 | 1.2.11 | Patch available | GHSA-j64v-xh5w-8hqj |
- CMS Vendormicroweber Affected up to 1.2.11 Fixed in — No fix listed CNA
- microweber/microweber (Packagist) Vendor— Affected before 1.2.11 Fixed in 1.2.11 Patch available GHSA-j64v-xh5w-8hqj
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microweber:microweber:*:*:*:*:*:*:*:* | up to 1.2.11 | Vulnerable | microweber |
- cpe:2.3:a:microweber:microweber:*:*:*:*:*:*:*:* Versions up to 1.2.11 Vulnerable ·microweber
Remediation
- Fix · GHSA-j64v-xh5w-8hqj microweber/microweber (Packagist) Fixed in 1.2.11 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-34076
- 2026-10-03 Alias added: GHSA-j64v-xh5w-8hqj
References
Exploit 2
Patch 2
More Microweber vulnerabilities
- TI-2023-01763 Command Injection in microweber/microweber CVSS 3.1CRITICAL 9.8
- TI-2023-02100 Improper Privilege Management in microweber/microweber CVSS 3.1HIGH 8.8
- TI-2022-14518 Microweber v1.2.15 was discovered to allow attackers to perform an account takeover via a host header injection attack. CVSS 3.1HIGH 8.8
- TI-2023-04891 Use of Hard-coded Credentials in microweber/microweber CVSS 3.1HIGH 7.5
- TI-2025-37870 Microweber CMS 2.0 has Weak Password Requirements. CVSS 3.1HIGH 8.3
- TI-2022-04247 Cross-site Scripting (XSS) - Stored in microweber/microweber CVSS 3.1MEDIUM 6.1
Sources
- CVE-2025-34076 · CVE Program
- CVE-2025-34076 · NVD
- FIRST EPSS
- GHSA-j64v-xh5w-8hqj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences