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CVE-2020-13383

66
FAUCET Score

CVE-2020-13383 is a Directory Traversal vulnerability affecting openSIS versions up to 7.4. This flaw allows an unauthenticated attacker to access arbitrary files and directories on the server, potentially leading to sensitive information disclosure. Rated 7.5 HIGH on CVSS, it is easily exploitable over the network with no user interaction required, posing a significant risk of data compromise. While not on the CISA KEV list, a Metasploit module exists for unauthenticated PHP code execution, indicating readily available exploit code, despite minimal public discussion or media coverage.

Impacted Technologies

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

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
67.79%
Probability of exploitation in next 30 days
EPSS Percentile
99.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: openSIS Unauthenticated PHP Code Execution · Jun 30, 2020
This CVE's current EPSS score of 0.6779 is in the 99th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

packetstormsecurity.com / files/158256/openSIS-7.4-Local-File-Inclusion.html
ExploitThird Party AdvisoryVDB Entry
packetstormsecurity.com / files/158331/openSIS-7.4-Unauthenticated-PHP-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
github.com / OS4ED/openSIS-Responsive-Design/commit/1127ae0bb7c3a2883febeabc6b71ad8d73510de8
PatchThird Party Advisory