CVE-2023-33955Network attack vector

Filename spoofing via unfiltered bidirectional override

Published May 30, 2023 · Updated Jan 10, 2025

Filename spoofing in MinIO Console before 0.28.0 allows remote authenticated users to conceal an object's original filename. The object-name display renders an embedded U+202E RIGHT-TO-LEFT OVERRIDE control character instead of replacing it, so following characters appear in reversed visual order. A user able to place an object with a chosen name can make the Console show a misleading name or apparent extension to other Console users.

CVSS severity4.3
Medium
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Filename spoofing in MinIO Console before 0.28.0 allows remote authenticated users to conceal an object's original filename. The object-name display renders an embedded U+202E RIGHT-TO-LEFT OVERRIDE control character instead of replacing it, so following characters appear in reversed visual order. A user able to place an object with a chosen name can make the Console show a misleading name or apparent extension to other Console users.

The record

CVE
CVE-2023-33955
Published
May 30, 2023
Updated
Jan 10, 2025
Vendor
MinIO
Product
MinIO Console
Classifications
CWE-200, T1036
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.28.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MinIO · MinIO Consoleversion=< 0.28.0

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1036Masquerading

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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