CVE-2021-39307
MEDIUMCVSS 6.1/10EPSS 1.08%
Last modified
CVE-2021-39307 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 1.08% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Pdftron | Webviewer Ui | <= 8.0 |
References
- https://research.nccgroup.com/2021/09/14/technical-advisory-pdftron-javascript-urls-allowed-in-webviewer-ui-cve-2021-39307/Exploit, Patch, Third Party Advisory
- https://www.pdftron.com/webviewer/Product, Vendor Advisory
- https://research.nccgroup.com/2021/09/14/technical-advisory-pdftron-javascript-urls-allowed-in-webviewer-ui-cve-2021-39307/Exploit, Patch, Third Party Advisory
- https://www.pdftron.com/webviewer/Product, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-39307?
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.
How severe is CVE-2021-39307?
CVE-2021-39307 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.
How do I fix CVE-2021-39307?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-39307?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST