CVE-2023-33955 is a medium-severity (CVSS 4.3) Information Exposure vulnerability in github.com/minio/console. A fix is available for github.com/minio/console — see the affected versions and patch details below.
Minio console object names with RIGHT-TO-LEFT OVERRIDE unicode character can be exploited
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-33955.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2023-33955 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,636 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
github.com/minio/consoleReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Unicode RIGHT-TO-LEFT OVERRIDE characters can be used to mask the original filename.
Reported-By
Thanks to the report from Mio Li [email protected]
Patches
commit 17e791afb90c9ad27c65f63c6be14f2f6a3a9d60
Author: Daniel Valdivia <[email protected]>
Date: Tue May 23 08:47:12 2023 -0700
Replace RIGHT-TO-LEFT OVERRIDE unicode (#2828)
Signed-off-by: Daniel Valdivia <[email protected]>
Workarounds
Workarounds are to remove the concerned file and rewrite it properly with the right file and extensions. Avoid using RTLO characters in your filenames.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/minio/console | all versions | 0.28.0go get github.com/minio/console@v0.28.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/minio/console, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/minio/console to 0.28.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-33955 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2023-33955 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2023-33955. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2023-33955 in your dependencies?
O3 Security finds CVE-2023-33955 across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.