CVE-2021-23562

Arbitrary File Upload

4.2 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

1.03%Down 0.4 points since Dec 4, 2021

What each source reports

CVE List Score used 4.2

Arbitrary File Upload

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.

Record: CVE-2021-23562
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Updated: 2026-11-02

EUVDEUVD-2021-2581 4.2

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.

Record: EUVD-2021-2581
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-rp2c-jrgp-cvr8 4.2

Code injection in plupload

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.

Record: GHSA-rp2c-jrgp-cvr8
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness: CWE-75, CWE-434
Updated: 2026-11-02

NVD 4.2

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.

Record: CVE-2021-23562
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-434
Updated: 2026-11-02

OSV 8.8

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.

Record: CVE-2021-23562
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-rp2c-jrgp-cvr8 4.2

Code injection in plupload

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.

Record: GHSA-rp2c-jrgp-cvr8
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness: CWE-434, CWE-75
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-23562 4.2

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.

Record: UBUNTU-CVE-2021-23562
CVSS 3.1: 4.2 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

tiny plupload

Affected packages

Affected packages
Package	Affected	Fixed
`plupload` npm	before 2.3.9	2.3.9
`plupload.js` Ubuntu:16.04:LTS	All versions, plus listed versions 2.1.8~dfsg1-1	None known
`plupload.js` Ubuntu:18.04:LTS	All versions, plus listed versions 2.1.9~dfsg1-12.1.9~dfsg1-2	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-23562 is a medium vulnerability (CVSS 4.2) in Tiny Plupload, published December 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.03%, the 63rd percentile. Fixed in plupload 2.3.9.

References

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