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CVE-2020-6143

32
FAUCET Score

CVE-2020-6143 is a critical remote code execution vulnerability affecting OS4Ed openSIS version 7.4. The flaw resides in the install functionality, specifically within the install/Step5.php file, where an attacker can inject PHP code into the Data.php file during installation by manipulating the password variable. This vulnerability carries a CVSS score of 9.8 (Critical), indicating it can be exploited remotely with low complexity and without user interaction, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation (not in KEV) and no public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, suggesting potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
7.4CPE matchmatch criteria
cpe:2.3:a:os4ed:opensis:7.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

10.0CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.17%
Probability of exploitation in next 30 days
EPSS Percentile
92.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0617 is in the 87th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

talosintelligence.com / vulnerability_reports/TALOS-2020-1083
ExploitThird Party Advisory