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CVE-2020-6637

51
FAUCET Score

CVE-2020-6637 is a critical SQL injection vulnerability affecting openSIS Community Edition version 7.3, specifically through the USERNAME parameter in index.php. With a CVSS score of 9.8, this flaw allows unauthenticated attackers to execute arbitrary SQL commands, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or Metasploit modules, a Nuclei template exists, and its high EPSS score suggests a significant likelihood of future exploitation. Despite its severity, there is minimal community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
7.3CPE matchmatch criteria
cpe:2.3:a:os4ed:opensis:7.3:*:*:*:community:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
20.06%
Probability of exploitation in next 30 days
EPSS Percentile
97.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Nuclei: CVE-2020-6637 · Jul 27, 2021
This CVE's current EPSS score of 0.2006 is in the 94th percentile among its peer group of 36,833 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

cinzinga.com / CVE-2020-6637
ExploitTechnical DescriptionThird Party Advisory
github.com / OS4ED/openSIS-Responsive-Design/commit/1127ae0bb7c3a2883febeabc6b71ad8d73510de8
PatchThird Party Advisory
opensis.com
Product
sourceforge.net / projects/opensis-ce/files
Third Party Advisory