CVE-2026-5362Public exploitNetwork attack vector

Stored XSS via unsanitized embed passthrough

Published Apr 27, 2026 · Updated Apr 27, 2026

Stored XSS in the Document embed editable in Pimcore 12.3.3 allows remote authenticated users to execute scripts in viewers' browsers. Embed::frontend() passes the stored value to Embera::autoEmbed() and returns its output as trusted HTML; unmatched HTML remains unchanged. Exploitation requires document edit and publish permission plus a viewer loading the published page, exposing that viewer's browser context.

CVSS severity4.8
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the Document embed editable in Pimcore 12.3.3 allows remote authenticated users to execute scripts in viewers' browsers. Embed::frontend() passes the stored value to Embera::autoEmbed() and returns its output as trusted HTML; unmatched HTML remains unchanged. Exploitation requires document edit and publish permission plus a viewer loading the published page, exposing that viewer's browser context.

The record

CVE
CVE-2026-5362
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
Pimcore
Product
Pimcore
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 2026Record 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=v12.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pimcore · Pimcoreversion=v12.3.3

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.8Fluid AttacksCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

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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