What is the CVSS score of CVE-2021-47755?

CVE-2021-47755 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.1%.

Which versions of Oliver V5 Library are affected by CVE-2021-47755?

Organizations using Oliver Library Server v5 face notable risk from CVE-2021-47755, a path traversal vulnerability rated CVSS 7.5.

Is there a public PoC exploit available for CVE-2021-47755?

Yes, a public proof-of-concept exploit is available for CVE-2021-47755. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2021-47755?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Review file handling controls and restrict upload directories.

Oliver V5 Library CVE-2021-47755

HIGH

Path Traversal (CWE-22)

2026-01-15 disclosure@vulncheck.com

Path Traversal Oliver V5 Library

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 26, 2026 - 16:15 vuln.today

Public exploit code

CVE Published

Jan 15, 2026 - 16:16 nvd

HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

Technical ContextAI

Classified as CWE-22 (Path Traversal). Affects the FileServlet component of Oliver V5 Library. 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.

RemediationAI

Monitor vendor advisories for a patch. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.

CVE-2021-47755 vulnerability details – vuln.today

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Oliver V5 Library CVE-2021-47755

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code