CVE-2020-22784: In Etherpad UeberDB < 0.4.4, due to MySQL omitting trailing spaces on char / varchar columns during comparison

Q: How do I fix CVE-2020-22784?

ueberdb: upgrade to 1.4.8. Exact commands for each OS are on this page.

Q: Is CVE-2020-22784 being exploited?

CVE-2020-22784 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-2020-22784 affect?

CVE-2020-22784 affects ueberdb. Severity is high (CVSS 7.5). In Etherpad UeberDB < 0.4.4, due to MySQL omitting trailing spaces on char / varchar columns during comparisons, retrieving database records using UeberDB's MySQL connector could allow bypassing access controls enforced on key names.

Q: How urgent is CVE-2020-22784?

Priority 52/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2020-22784 is a high-severity flaw (CVSS 7.5) affecting ueberdb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Etherpad UeberDB < 0.4.4, due to MySQL omitting trailing spaces on char / varchar columns during comparisons, retrieving database records using UeberDB's MySQL connector could allow bypassing access controls enforced on key names.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

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	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-697
Published	2021-04-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: etherpad

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 21:15 UTCPublished CVE record published
2026-06-17 03:04 UTCUpdated Record last modified

etherpad ueberdb UPGRADE

Affected: < 1.4.8

Fixed in: 1.4.8

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.4.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ueberdb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ueberdb

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-2020-22784?

ueberdb: upgrade to 1.4.8. Exact commands for each OS are on this page.

Is CVE-2020-22784 being exploited?

CVE-2020-22784 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-2020-22784 affect?

CVE-2020-22784 affects ueberdb. Severity is high (CVSS 7.5). In Etherpad UeberDB < 0.4.4, due to MySQL omitting trailing spaces on char / varchar columns during comparisons, retrieving database records using UeberDB's MySQL connector could allow bypassing access controls enforced on key names.

How urgent is CVE-2020-22784?

Priority 52/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

MySQL vulnerabilities

References

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