CVE-2021-33213: An SSRF vulnerability in the "Upload from URL" feature in Elements-IT HTTP Commander 5.3.3 allows remote authe

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MEDIUM 6.5DOWNGRADE

CVE-2021-33213 is a medium-severity flaw (CVSS 6.5) affecting http commander. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An SSRF vulnerability in the "Upload from URL" feature in Elements-IT HTTP Commander 5.3.3 allows remote authenticated users to retrieve HTTP and FTP files from the internal server network by inserting an internal address.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-918
Published	2021-07-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: element-it

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 14:15 UTCPublished CVE record published
2026-06-17 03:54 UTCUpdated Record last modified

element-it http commander DOWNGRADE

Affected: 5.3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.3.3

1. Check installed version

apt-cache policy http-commander || rpm -q http-commander || http-commander --version

2. No fixed release: DOWNGRADE to a release before 5.3.3 (Debian / Ubuntu)

apt-cache madison http-commander sudo apt install http-commander=<VERSION_BEFORE_5.3.3> sudo apt-mark hold http-commander

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

dnf --showduplicates list http-commander sudo dnf downgrade http-commander-<VERSION_BEFORE_5.3.3> sudo dnf versionlock add http-commander

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-2021-33213?

http commander: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-33213 being exploited?

CVE-2021-33213 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-2021-33213 affect?

CVE-2021-33213 affects http commander. Severity is medium (CVSS 6.5). An SSRF vulnerability in the "Upload from URL" feature in Elements-IT HTTP Commander 5.3.3 allows remote authenticated users to retrieve HTTP and FTP files from the internal server network by inserting an internal address.

How urgent is CVE-2021-33213?

Priority 45/100. Public exploit reference

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References

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