CVE-2020-22781 Denial of service in n/a

What is CVE-2020-22781?

CVE-2020-22781 is a high-severity denial of service vulnerability in n/a, published on 28 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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).

Weakness: CWE-89

Which versions are affected by CVE-2020-22781?

It affects 1 product.

Products include Etherpad Etherpad.

How do I fix CVE-2020-22781?

No fix has been published for CVE-2020-22781 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-22781 being exploited?

There is no known exploitation of CVE-2020-22781 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2021-43802 Admin privilege escalation and arbitrary code execution via malicious *.etherpad imports Critical 9.9
• CVE-2018-9326 Code injection in n/a Critical 9.8
• CVE-2018-6835 Etherpad Lite Access Restriction Bypass Critical 9.8
• CVE-2018-9327 Code injection in n/a High 8.1
• CVE-2020-22782 Denial of service in n/a High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-66mc-4v3r-qwh3.