CVE-2021-3204: SSRF in the document conversion component of Webware Webdesktop 5.1.15 allows an attacker to read all files fr

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MEDIUM 6.5DOWNGRADE

CVE-2021-3204 is a medium-severity flaw (CVSS 6.5) affecting webdesktop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SSRF in the document conversion component of Webware Webdesktop 5.1.15 allows an attacker to read all files from the server.

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	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-918
Published	2021-02-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: webware

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

Am I affected?

Timeline

2021-02-19 14:15 UTCPublished CVE record published
2026-06-17 04:04 UTCUpdated Record last modified

webware webdesktop DOWNGRADE

Affected: 5.1.15

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.1.15

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.1.15 (Debian / Ubuntu)

apt-cache madison webdesktop sudo apt install webdesktop=<VERSION_BEFORE_5.1.15> sudo apt-mark hold webdesktop

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

dnf --showduplicates list webdesktop sudo dnf downgrade webdesktop-<VERSION_BEFORE_5.1.15> sudo dnf versionlock add webdesktop

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-2021-3204?

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

Is CVE-2021-3204 being exploited?

CVE-2021-3204 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-2021-3204 affect?

CVE-2021-3204 affects webdesktop. Severity is medium (CVSS 6.5). SSRF in the document conversion component of Webware Webdesktop 5.1.15 allows an attacker to read all files from the server.

How urgent is CVE-2021-3204?

Priority 43/100. Public exploit reference

References

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