Metasys Reporting Engine (MRE) Web Services - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

published 2021-02-19 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29879

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 3.8%; EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits: 0; none known

Path Traversal vulnerability exists in Metasys Reporting Engine (MRE) Web Services which could allow a remote unauthenticated attacker to access and download arbitrary files from the system.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-049-01 updated 2021-02-18 cvss 7.5

Johnson Controls Metasys Reporting Engine (MRE) Web Services

Johnson Controls Inc Metasys Reporting Engine (MRE) 2.1, 2
affected: mitigation “Johnson Controls recommends users upgrade to MRE v2.2 or later. Users with licenses for MRE should contact their local branch office for remediation.” johnsoncontrols.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

3.79% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

Johnson Controls Metasys Reporting Engine (MRE) Web Services versions 2.0 and 2.1

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

johnsoncontrols.com /cyber-solutions/security-advisories
vendor-advisory
us-cert.gov /ics/advisories/icsa-21-049-01
third-party-advisory, us-government-resource

Sources

CVE List CVE-2020-9050
NVD CVE-2020-9050

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary