What’s Vulnerable › Vulnerabilities

CVE-2021-23562: Arbitrary File Upload

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-03 · updated 2026-06-17
• Weakness: CWE-434

Description

This affects the package plupload before 2.3.9. A file name containing JavaScript code could be uploaded and run. An attacker would need to trick a user to upload this kind of file.

Affected products

• plupload: before 2.3.9 — fixed in 2.3.9

How to fix

Upgrade to a fixed version: plupload 2.3.9. Check the vendor advisory for mitigations.

References

• https://github.com/moxiecode/plupload/blob/master/js/jquery.plupload.queue/jquery.plupload.queue.js%23L226
• https://github.com/moxiecode/plupload/commit/d12175d4b5fa799b994ee1bb17bfbeec55b386fb
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-2306665
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2306663
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBMOXIECODE-2306664
• https://snyk.io/vuln/SNYK-JS-PLUPLOAD-1583909
• https://github.com/moxiecode/plupload/blob/master/js/jquery.plupload.queue/jquery.plupload.queue.js%23L226
• https://github.com/moxiecode/plupload/commit/d12175d4b5fa799b994ee1bb17bfbeec55b386fb
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-2306665
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2306663
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBMOXIECODE-2306664
• https://snyk.io/vuln/SNYK-JS-PLUPLOAD-1583909

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