CVE-2021-39307 Cross-site scripting in n/a
Attackers can execute arbitrary JavaScript by tricking users into opening documents with malicious hyperlinks in PDFTron WebViewer UI.
- 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-2021-39307?
CVE-2021-39307 is a medium-severity cross-site scripting vulnerability in n/a, published on 15 Sep 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
PDFTron's WebViewer UI 8.0 or below renders dangerous URLs as hyperlinks in supported documents, including JavaScript URLs, allowing the execution of arbitrary JavaScript code.
Weakness: CWE-79
Which versions are affected by CVE-2021-39307?
It affects 1 product.
Products include Pdftron Webviewer Ui.
How do I fix CVE-2021-39307?
No fix has been published for CVE-2021-39307 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-2021-39307 being exploited?
There is no known exploitation of CVE-2021-39307 in the wild and no public exploit code.
Sources
Also known as GHSA-h97p-5fjq-c93c.