CVE-2021-30637 Cross-site scripting in n/a

Medium 5.4 Published 13 Apr 2021 Updated 3 Aug 2024

Stored XSS in htmly allows attackers to inject scripts via blog title, tagline, or description fields, potentially compromising user sessions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-30637?

CVE-2021-30637 is a medium-severity cross-site scripting vulnerability in n/a, published on 13 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.

Weakness: CWE-79

Which versions are affected by CVE-2021-30637?

It affects 1 product.

Products include Htmly Htmly.

How do I fix CVE-2021-30637?

No fix has been published for CVE-2021-30637 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-2021-30637 being exploited?

There is no known exploitation of CVE-2021-30637 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

Sources

Also known as GHSA-4h65-85ww-qq7p.