CVE-2021-25200: Arbitrary file upload vulnerability in SourceCodester Learning Management System v 1.0 allows attackers to exe

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-25200 is a critical-severity flaw (CVSS 9.8) affecting learning management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Arbitrary file upload vulnerability in SourceCodester Learning Management System v 1.0 allows attackers to execute arbitrary code, via the file upload to \lms\student_avatar.php.

Why this priority

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

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-434
Published	2021-07-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: learning management system project

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

Am I affected?

Timeline

2021-07-30 14:15 UTCPublished CVE record published
2026-06-17 03:41 UTCUpdated Record last modified

learning management system project learning management system DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy learning-management-system || rpm -q learning-management-system || learning-management-system --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison learning-management-system sudo apt install learning-management-system=<VERSION_BEFORE_1.0> sudo apt-mark hold learning-management-system

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list learning-management-system sudo dnf downgrade learning-management-system-<VERSION_BEFORE_1.0> sudo dnf versionlock add learning-management-system

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-25200?

learning management system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-25200 being exploited?

CVE-2021-25200 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-2021-25200 affect?

CVE-2021-25200 affects learning management system. Severity is critical (CVSS 9.8). Arbitrary file upload vulnerability in SourceCodester Learning Management System v 1.0 allows attackers to execute arbitrary code, via the file upload to \lms\student_avatar.php.

How urgent is CVE-2021-25200?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

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References

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