CVE-2020-13383
HighPublic exploitopenSIS through 7.4 allows Directory Traversal.
Published Jul 1, 2020 · Updated Aug 27, 2026
Key Facts
Patch immediately- CVE-2020-13383 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Opensis (Os4ed).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 68% probability of exploitation in the next 30 days.
- Fixed versions are available, including Opensis <=7.4, Opensis 7.4.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
68%
Higher than 99.3% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
openSIS through 7.4 allows Directory Traversal.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OpensisOs4ed | See advisory | 7.4 |
Patched Releases
Opensis
<=7.4
Timeline
Publicly disclosed
Jul 1, 2020
Last updated
Aug 27, 2026
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- patchhttps://github.com/OS4ED/openSIS-Responsive-Design/commit/1127ae0bb7c3a2883febeabc6b71ad8d73510de8
- exploithttp://packetstormsecurity.com/files/158256/openSIS-7.4-Local-File-Inclusion.html
- exploithttp://packetstormsecurity.com/files/158331/openSIS-7.4-Unauthenticated-PHP-Code-Execution.html
- exploitMSF opensis_chain_exec.rb
FAQ
Common Questions.
openSIS through 7.4 allows Directory Traversal.
Affected: Opensis (Os4ed). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Opensis <=7.4, Opensis 7.4.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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