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CVE-2020-5242

22
FAUCET Score

CVE-2020-5242 is a critical vulnerability affecting openHAB versions prior to 2.5.2, allowing remote attackers to execute arbitrary commands on the system. This vulnerability has a CVSS score of 8.8 (High), indicating a network-based attack with low complexity, requiring no privileges, and leading to high impact on confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the potential for severe compromise necessitates immediate patching. The fix involves whitelisting commands, preventing remote modification via REST calls.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.5.2CPE matchmatch criteria
cpe:2.3:a:openhab:openhab:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.7HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.3
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.97%
Probability of exploitation in next 30 days
EPSS Percentile
78.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0197 is in the 78th percentile among its peer group of 14,855 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / openhab/openhab-addons/commit/4c4cb664f2e2c3866aadf117d22fb54aa8dd0031
PatchThird Party Advisory
github.com / openhab/openhab-addons/security/advisories/GHSA-w698-693g-23hv
Third Party Advisory