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Public proof of conceptFix available

CVE-2021-45027

A public proof of concept exists; no exploitation attested.

  • Published2022-09-01
  • Fixed in8.00.008.053
  • WeaknessCWE-494

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An arbitrary file download vulnerability in Oliver v5 Library Server Versions < 5.00.008.053 via the FileServlet function allows for arbitrary file download by an attacker using unsanitized user supplied input.

Timeline

dates in UTC
  1. 2022-09-0118:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-45027?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-45027?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Softlinkint oliver v5 library
BranchAffectedFixed in
8.0< 8.00.008.0538.00.008.053

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Softlinkint oliver v5 library to 8.00.008.053

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2022-09-01
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-45027?

An arbitrary file download vulnerability in Oliver v5 Library Server Versions < 5.00.008.053 via the FileServlet function allows for arbitrary file download by an attacker using unsanitized user supplied input.

Is CVE-2021-45027 actively exploited?

Active exploitation of CVE-2021-45027 has not been confirmed. Its EPSS score was 2.0% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-45027?

CVE-2021-45027 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record