Vulnerability Details : 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.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-39307
- cpe:2.3:a:pdftron:webviewer_ui:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-39307
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 47 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-39307
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2021-39307
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-39307
-
https://research.nccgroup.com/2021/09/14/technical-advisory-pdftron-javascript-urls-allowed-in-webviewer-ui-cve-2021-39307/
Technical Advisory: PDFTron JavaScript URLs Allowed in WebViewer UI (CVE-2021-39307) – NCC Group ResearchExploit;Patch;Third Party Advisory
-
https://www.pdftron.com/webviewer/
WebViewer - JavaScript PDF Viewer: View, Generate, Edit, More | PDFTron SDKProduct;Vendor Advisory
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