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.

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)

EPSS: 0.008 (51.3th percentile) — read the EPSS interpretation.

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.

Affected products

Softlink Education Oliver Library Server — versions < 8.00.008.053
Softlinkint Oliver_v5_library

Weakness classification (CWE)

CWE-22 — Path Traversal

References

disclosure@vulncheck.com (Exploit, Third Party Advisory, exploit)
disclosure@vulncheck.com (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.