Path Traversal in Softlink Education Oliver Library Server
CVE-2021-47755
Oliver Library Server v5 contains a file download vulnerability that allows unauthenticated attackers to access arbitrary system files through unsanitized input in the FileServlet endpoint. Attackers can exploit the vulnerability by manipulating the 'fileName' parameter to download sensitive files from the server's filesystem.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (55.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% 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: +0.001
Affected products
- Softlink Education Oliver Library Server — versions < 8.00.008.053
- Softlinkint Oliver V5 Library
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50599 (Exploit, Third Party Advisory, exploit)
- www.softlinkint.com/product/oliver/ (Product, product)
Frequently asked questions
- What is CVE-2021-47755?
- CVE-2021-47755 is a high-severity vulnerability in Softlink Education Oliver Library Server, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-01-15.
- How severe is CVE-2021-47755?
- High severity. CVSS v3 base score is 7.5 out of 10.