CVE-2021-47755: Oliver Library Server v5 contains a file download vulnerability that allows unauthenticated attackers to acces

Q: How do I fix CVE-2021-47755?

oliver v5 library: upgrade to 8.00.008.053. Exact commands for each OS are on this page.

Q: Is CVE-2021-47755 being exploited?

CVE-2021-47755 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-47755 affect?

CVE-2021-47755 affects oliver v5 library. Severity is high (CVSS 7.5). 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 manipul

Q: How urgent is CVE-2021-47755?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-47755 is a high-severity flaw (CVSS 7.5) affecting oliver v5 library. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-01-15
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: softlinkint

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-15 16:16 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

softlinkint oliver v5 library UPGRADE

Affected: < 8.00.008.053

Fixed in: 8.00.008.053

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy oliver-v5-library || rpm -q oliver-v5-library || oliver-v5-library --version

2. UPGRADE to 8.00.008.053 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade oliver-v5-library

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade oliver-v5-library

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-47755?

oliver v5 library: upgrade to 8.00.008.053. Exact commands for each OS are on this page.

Is CVE-2021-47755 being exploited?

CVE-2021-47755 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-47755 affect?

CVE-2021-47755 affects oliver v5 library. Severity is high (CVSS 7.5). 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 manipul

How urgent is CVE-2021-47755?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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