CVE-2021-4084

Cross-site Scripting (XSS) - Stored in pimcore/pimcore

7.4 HighFix available

pimcore is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.61%Up 0.9 points since Dec 11, 2021

What each source reports

CVE List Score used 7.4

Cross-site Scripting (XSS) - Stored in pimcore/pimcore

pimcore is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Record: CVE-2021-4084
CVSS 3.0: 7.4 HighCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2021-2487 7.4

pimcore is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Record: EUVD-2021-2487
CVSS 3.0: 7.4 HighCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-8w3x-r6x7-c5r5 6.1

Cross-site Scripting in pimcore

pimcore is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Record: GHSA-8w3x-r6x7-c5r5
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 6.1

pimcore is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Record: CVE-2021-4084
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 3.0: 7.4 HighCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 6.1

pimcore is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Record: CVE-2021-4084
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVGHSA-8w3x-r6x7-c5r5 6.1

Cross-site Scripting in pimcore

pimcore is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Record: GHSA-8w3x-r6x7-c5r5
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`pimcore/pimcore` Packagist	before 10.2.6	10.2.6
`pimcore/pimcore` Packagist	before 10.2.6, plus listed versions 10.0.82.2.02.2.12.2.22.3.0 Show 45 moreShow less 3.0.03.0.13.0.23.0.33.0.43.0.53.0.63.1.03.1.14.0.04.0.14.1.04.1.14.1.24.1.34.2.04.3.04.3.14.4.04.4.14.4.24.4.34.5.04.6.04.6.14.6.24.6.34.6.44.6.5v10.0.0v10.0.0-BETA1v10.0.0-BETA2v10.0.0-BETA3v10.0.0-BETA4v10.0.1v10.0.2v10.0.3v10.0.4v10.0.5v10.0.6v10.0.7v10.0.9v10.1.0v10.1.1v10.1.2	10.2.6

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	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-2021-4084 is a high vulnerability (CVSS 7.4) in Pimcore, published December 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.61%, the 76th percentile. Fixed in pimcore/pimcore 10.2.6.

References

This page doesn't list everything

Left out here: 120 versions. The JSON record has them.