CVE-2020-21993: In WEMS Limited Enterprise Manager 2.58, input passed to the GET parameter 'email' is not properly sanitized b

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MEDIUM 6.1DOWNGRADE

CVE-2020-21993 is a medium-severity flaw (CVSS 6.1) affecting enterprise manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In WEMS Limited Enterprise Manager 2.58, input passed to the GET parameter 'email' is not properly sanitized before being returned to the user. This can be exploited to execute arbitrary HTML code in a user's browser session in context of an affected site.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-04-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: wems

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

Am I affected?

Timeline

2021-04-28 15:15 UTCPublished CVE record published
2026-06-17 03:04 UTCUpdated Record last modified

wems enterprise manager DOWNGRADE

Affected: 2.19.7959 · 2.55.8782 · 2.55.8806 · 2.58.8903

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.19.7959

1. Check installed version

apt-cache policy enterprise-manager || rpm -q enterprise-manager || enterprise-manager --version

2. No fixed release: DOWNGRADE to a release before 2.19.7959 (Debian / Ubuntu)

apt-cache madison enterprise-manager sudo apt install enterprise-manager=<VERSION_BEFORE_2.19.7959> sudo apt-mark hold enterprise-manager

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

dnf --showduplicates list enterprise-manager sudo dnf downgrade enterprise-manager-<VERSION_BEFORE_2.19.7959> sudo dnf versionlock add enterprise-manager

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-2020-21993?

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

Is CVE-2020-21993 being exploited?

CVE-2020-21993 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-2020-21993 affect?

CVE-2020-21993 affects enterprise manager. Severity is medium (CVSS 6.1). In WEMS Limited Enterprise Manager 2.58, input passed to the GET parameter 'email' is not properly sanitized before being returned to the user. This can be exploited to execute arbitrary HTML code in a user's browser session in context of a

How urgent is CVE-2020-21993?

Priority 41/100. Public exploit reference

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References

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