CVE-2025-34076

published 2025-07-02

CVE-2025-34076: An authenticated local file inclusion vulnerability exists in Microweber CMS versions <= 1.2.11 through misuse of the backup management API. Authenticated…

Priority P3 52 high 7.2 CVSS 3.1

AV N AC L PR H UI N S U C H I H A H

EXPLOIT

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.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
microweber	microweber	<= 1.2.11	—
microweber	microweber	>= 0 < 1.2.11	1.2.11
microweber_ltd	cms	<= 1.2.11	—

Detection & IOCs extracted from sources · hover to see the quote

url /api/BackupV2/upload↗

url /api/BackupV2/download↗

• → Alert on sequential authenticated requests to /api/BackupV2/upload followed by /api/BackupV2/download from the same session, as this two-step pattern is the exploitation chain for arbitrary file disclosure. ↗
• → Watch for unexpected file deletions on the web server filesystem coinciding with requests to the BackupV2 upload endpoint, indicating exploitation by a user with sufficient web service privileges. ↗

• · Exploitation requires an authenticated session; unauthenticated access to the BackupV2 endpoints is not sufficient to trigger the vulnerability. ↗

CVSS provenance

nvd v3.1 7.2 HIGH CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvd v4.0 6.1 MEDIUM CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/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

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