CVE-2021-34817 Cross-site scripting in n/a

What is CVE-2021-34817?

CVE-2021-34817 is a medium-severity cross-site scripting vulnerability in n/a, published on 19 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad.

Weakness: CWE-79

Which versions are affected by CVE-2021-34817?

It affects 1 product.

Products include Etherpad Etherpad.

How do I fix CVE-2021-34817?

No fix has been published for CVE-2021-34817 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-34817 being exploited?

There is no known exploitation of CVE-2021-34817 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-2020-22781 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-543c-wff7-pg59.