CVE-2021-41467 Cross-site scripting in application/controllers/dropbox.php in JustWriting
Remote attackers can inject arbitrary web script or HTML via the challenge parameter in JustWriting, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-41467?
CVE-2021-41467 is a medium-severity cross-site scripting vulnerability in n/a, published on 1 Oct 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
Cross-site scripting (XSS) vulnerability in application/controllers/dropbox.php in JustWriting 1.0.0 and below allow remote attackers to inject arbitrary web script or HTML via the challenge parameter.
Weakness: CWE-79
Which versions are affected by CVE-2021-41467?
2 open source packages ship an affected version, including hjue/justwriting. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
hjue/justwriting Packagist | All versions to 1.0.0 | None |
hjue/justwriting Packagist | All versions to 1.0.0 | None |
Products include Justwriting Project Justwriting.
How do I fix CVE-2021-41467?
No fix has been published for CVE-2021-41467 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-2021-41467 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-41467 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-gxmc-5wj3-jx64.