CVE-2018-25439 MetInfo CVE debrief

Who should care

Defenders responsible for MetInfo CMS deployments should assess exposure and prioritize verification of versions before 6.1.1. Defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Defenders should plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Why it matters

CVE-2018-25439 is a path traversal vulnerability in MetInfo CMS versions before 6.1.1 that allows unauthenticated attackers to read arbitrary files. Defenders should prioritize verifying exposure and assessing the feasibility of path traversal attacks.

• Potential unauthorized file access
• Possible data breaches due to path traversal
• Required verification of MetInfo CMS versions
• Potential impact on confidentiality

Technical summary

MetInfo CMS versions before 6.1.1 contain a path traversal vulnerability in /include/thumb.php that allows unauthenticated attackers to read arbitrary files via the dir parameter. The vulnerability was first observed by the Shadowserver Foundation on 2023-10-14. Attackers can send crafted requests with backslash sequences bypassing the str_replace filter to read files like config_db.php on Windows. Defenders should prioritize verifying exposure of MetInfo CMS versions before 6.1.1 and assessing the feasibility of path traversal attacks.

Defensive priority

Defenders should prioritize verifying exposure of MetInfo CMS versions before 6.1.1 and assessing the feasibility of path traversal attacks.

Recommended defensive actions

• Verify MetInfo CMS versions before 6.1.1 are not in use
• Assess the feasibility of path traversal attacks
• Implement input validation and sanitization for the dir parameter in thumb.php
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability is described in the CVE Program record and NVD vulnerability detail page. Evidence of exploitation was first observed by the Shadowserver Foundation on 2023-10-14. Defenders should verify MetInfo CMS versions before 6.1.1 are not in use and assess the feasibility of path traversal attacks. The CVE Program record and NVD vulnerability detail page provide further details on the vulnerability.

Sources and 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.