Path Traversal in Os4ed Opensis
CVE-2025-22927
An issue in OS4ED openSIS v8.0 through v9.1 allows attackers to execute a directory traversal by sending a crafted POST request to /Modules.php?modname=messaging/Inbox.php&modfunc=save&filename.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/OS4ED/openSIS-Classic (Product)
- github.com/esusalla/vulnerability-research/tree/main/CVE-2025-22927 (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-22927?
- CVE-2025-22927 is a critical-severity vulnerability in Os4ed Opensis, classified under Path Traversal. CVSS score: 9.1/10. Published 2025-04-03.
- How severe is CVE-2025-22927?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2025-22927 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.