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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-39300Potential vulnerabilities have been identified in UEFI firmw…8.8
- CVE-2021-39301Potential vulnerabilities have been identified in UEFI firmw…8.8
- CVE-2021-39302MISP 2.4.148, in certain configurations, allows SQL injectio…9.8
- CVE-2021-39303The server in Jamf Pro before 10.32.0 has an SSRF vulnerabil…9.8
- CVE-2021-39304Proofpoint Enterprise Protection before 8.12.0-2108090000 al…7.5
- CVE-2021-39306A stack buffer overflow was discovered on Realtek RTL8195AM …9.8
- CVE-2021-39308The WooCommerce myghpay Payment Gateway WordPess plugin is v…6.1
- CVE-2021-39309The Parsian Bank Gateway for Woocommerce WordPress plugin is…6.1
- CVE-2021-3931snipe-it is vulnerable to Cross-Site Request Forgery (CSRF)4.3
- CVE-2021-39310The Real WYSIWYG WordPress plugin is vulnerable to Reflected…6.1
- CVE-2021-39311The link-list-manager WordPress plugin is vulnerable to Refl…6.1
- CVE-2021-39312The True Ranker plugin <= 2.2.2 for WordPress allows arbitra…7.5
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