CVE-2023-0670: Ulearn version a5a7ca20de859051ea0470542844980a66dfc05d allows an attacker with administrator permissions to o

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HIGH 7.2MITIGATE

CVE-2023-0670 is a high-severity flaw (CVSS 7.2) affecting ulearn. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Ulearn version a5a7ca20de859051ea0470542844980a66dfc05d allows an attacker with administrator permissions to obtain remote code execution on the server through the image upload functionality. This occurs because the application does not validate that the uploaded image is actually an image.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-04-05
Last modified	2026-06-17

Publisher (CNA): Fluid Attacks · Vendor: ulearn project

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

Am I affected?

Timeline

2023-04-05 19:15 UTCPublished CVE record published
2026-06-17 05:26 UTCUpdated Record last modified

ulearn project ulearn MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ulearn || rpm -q ulearn || ulearn --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2023-0670?

ulearn: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-0670 being exploited?

CVE-2023-0670 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-2023-0670 affect?

CVE-2023-0670 affects ulearn. Severity is high (CVSS 7.2). Ulearn version a5a7ca20de859051ea0470542844980a66dfc05d allows an attacker with administrator permissions to obtain remote code execution on the server through the image upload functionality. This occurs because the application does not val

How urgent is CVE-2023-0670?

Priority 41/100. High severity

References

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