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PatchSiren cyber security CVE debrief

CVE-2026-12198 Microweber CVE debrief

A weakness has been identified in Microweber up to 2.0.20. This affects the function userfiles_path of the file /api_nosession/thumbnail_img of the component API Endpoint. Executing a manipulation of the argument cache_path_relative can lead to path traversal. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Vendor
Microweber
Product
Microweber
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of Microweber up to 2.0.20

Technical summary

The vulnerability is a path traversal issue in the userfiles_path function of the /api_nosession/thumbnail_img file in the Microweber API Endpoint. An attacker can manipulate the cache_path_relative argument to traverse the file system.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update Microweber to a version beyond 2.0.20
  • Restrict access to the /api_nosession/thumbnail_img endpoint
  • Validate and sanitize user input to prevent path traversal attacks

Evidence notes

The CVE-2026-12198 vulnerability has been documented by NVD and Vuldb.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12198 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12198

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-12198 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12198

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.