CVE-2021-23407: This affects the package elFinder.Net.Core from 0 and before 1.2.4

Q: How do I fix CVE-2021-23407?

elfinder.net.core: upgrade to 1.2.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-23407 being exploited?

CVE-2021-23407 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-23407 affect?

CVE-2021-23407 affects elfinder.net.core. Severity is high (CVSS 7.5). This affects the package elFinder.Net.Core from 0 and before 1.2.4. The user-controlled file name is not properly sanitized before it is used to create a file system path.

Q: How urgent is CVE-2021-23407?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-23407 is a high-severity flaw (CVSS 7.5) affecting elfinder.net.core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects the package elFinder.Net.Core from 0 and before 1.2.4. The user-controlled file name is not properly sanitized before it is used to create a file system path.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-22
Published	2021-07-14
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: elfinder.net.core project

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

Am I affected?

Timeline

2021-07-14 17:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

elfinder.net.core project elfinder.net.core UPGRADE

Affected: < 1.2.4

Fixed in: 1.2.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy elfinder.net.core || rpm -q elfinder.net.core || elfinder.net.core --version

2. UPGRADE to 1.2.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade elfinder.net.core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade elfinder.net.core

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2021-23407?

elfinder.net.core: upgrade to 1.2.4. Exact commands for each OS are on this page.

Is CVE-2021-23407 being exploited?

CVE-2021-23407 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-2021-23407 affect?

CVE-2021-23407 affects elfinder.net.core. Severity is high (CVSS 7.5). This affects the package elFinder.Net.Core from 0 and before 1.2.4. The user-controlled file name is not properly sanitized before it is used to create a file system path.

How urgent is CVE-2021-23407?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

← Back to latest CVEs