What’s Vulnerable › Vulnerabilities

CVE-2020-22781

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-28 · updated 2026-06-17
• Weakness: CWE-89

Description

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).

Affected products

• etherpad-lite: before 1.8.3 — fixed in 1.8.3

How to fix

Upgrade to a fixed version: etherpad-lite 1.8.3. Check the vendor advisory for mitigations.

References

• https://github.com/ether/etherpad-lite/issues/3502
• https://github.com/ether/etherpad-lite/issues/3502

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