CVE-2023-23937Network attack vector

Stored cross-site scripting via polyglot profile image

Published Feb 3, 2023 · Updated Mar 10, 2025

Unrestricted file upload in Pimcore before 10.5.16 allows remote authenticated users to store same-origin JavaScript via a profile image. UserController::uploadImageAction passes the uploaded Filedata temporary path to setImage() without verifying that its detected MIME mapping is an image. Any authenticated account can prefix HTML with an image signature such as GIF89, causing the uploaded script to execute in the application domain.

CVSS severity8.2
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Pimcore before 10.5.16 allows remote authenticated users to store same-origin JavaScript via a profile image. UserController::uploadImageAction passes the uploaded Filedata temporary path to setImage() without verifying that its detected MIME mapping is an image. Any authenticated account can prefix HTML with an image signature such as GIF89, causing the uploaded script to execute in the application domain.

The record

CVE
CVE-2023-23937
Published
Feb 3, 2023
Updated
Mar 10, 2025
Vendor
Pimcore
Product
Pimcore
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.5.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pimcore · Pimcoreversion=< 10.5.16

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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