CVE-2020-12707 Cross-site scripting in n/a
Attackers can execute arbitrary JavaScript via HTML event handlers in Lepton CMS due to insufficient XSS filtering, 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-2020-12707?
CVE-2020-12707 is a medium-severity cross-site scripting vulnerability in n/a, published on 7 May 2020. 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
An XSS vulnerability exists in modules/wysiwyg/save.php of LeptonCMS 4.5.0. This can be exploited because the only security measure used against XSS is the stripping of SCRIPT elements. A malicious actor can use HTML event handlers to run JavaScript instead of using SCRIPT elements.
Weakness: CWE-79
Which versions are affected by CVE-2020-12707?
It affects 1 product.
Products include Lepton-Cms Lepton Cms.
How do I fix CVE-2020-12707?
No fix has been published for CVE-2020-12707 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-2020-12707 being exploited?
There is no known exploitation of CVE-2020-12707 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Sources
Also known as GHSA-x28g-jx38-xw6g.