What is CVE-2020-22781?

CVE-2020-22781 is a high-severity vulnerability in Etherpad, classified under SQL Injection. CVSS score: 7.5/10. Published 2021-04-28.

How severe is CVE-2020-22781?

High severity. CVSS v3 base score is 7.5 out of 10.

SQL Injection in Etherpad

CVE-2020-22781

In Etherpad < 1.8.3, a specially crafted URI would raise an unhandled exception in the cache mechanism and cause a denial of service (crash the instance).

Vulnerability class: SQL Injection

Published 2021-04-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.7th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Etherpad

Weakness classification (CWE)

CWE-89 — SQL Injection

References

github.com/ether/etherpad-lite/issues/3502 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-22781?: CVE-2020-22781 is a high-severity vulnerability in Etherpad, classified under SQL Injection. CVSS score: 7.5/10. Published 2021-04-28.
How severe is CVE-2020-22781?: High severity. CVSS v3 base score is 7.5 out of 10.