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CVE-2020-27409

20
FAUCET Score

CVE-2020-27409 describes a Cross-Site Scripting (XSS) vulnerability in OpenSIS Community Edition versions prior to 7.5, specifically within the SideForStudent.php file via the 'modname' parameter. This medium-severity vulnerability (CVSS 6.1) allows an unauthenticated attacker to inject malicious scripts, potentially leading to information disclosure or defacement, requiring user interaction to be exploited. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.5CPE matchmatch criteria
cpe:2.3:a:os4ed:opensis:*:*:*:*:community:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.18%
Probability of exploitation in next 30 days
EPSS Percentile
64.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 77th percentile among its peer group of 26,236 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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

github.com / OS4ED/openSIS-Responsive-Design/commit/edca0855e7bc27d5b28dcb2d16f057ada865e282
PatchThird Party Advisory
github.com / OS4ED/openSIS-Responsive-Design/compare/ver7.4...V7.5
Third Party Advisory
insinuator.net / 2020/10/opensis-vulnerabilities
Third Party Advisory