CVE-2026-54087Network attack vectorHinoki check available

Stored XSS via inline browser-executable file uploads

Published Sep 14, 2026 · Updated Sep 14, 2026

Stored XSS in EasyCorp EasyAdminBundle 5.0.0 through 5.0.12 allows remote authenticated users to run script via uploaded HTML or SVG. FileField applies no MIME or extension restrictions, while ImageField accepts SVG, and the file template links uploads for same-origin inline rendering. Exploitation requires a public upload directory, access to an affected form, and a higher-privileged administrator to open the file, exposing session or CSRF tokens and enabling privilege escalation.

CVSS severity7.6
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in EasyCorp EasyAdminBundle 5.0.0 through 5.0.12 allows remote authenticated users to run script via uploaded HTML or SVG. FileField applies no MIME or extension restrictions, while ImageField accepts SVG, and the file template links uploads for same-origin inline rendering. Exploitation requires a public upload directory, access to an affected form, and a higher-privileged administrator to open the file, exposing session or CSRF tokens and enabling privilege escalation.

The record

CVE
CVE-2026-54087
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
EasyCorp
Product
EasyAdminBundle
Classifications
CWE-434, CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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=>= 5.0.0, < 5.0.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

EasyCorp · EasyAdminBundleversion=>= 5.0.0, < 5.0.13

Published CVSS scores

7.6GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/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
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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