CVE-2024-28190Network attack vector

Stored script execution via unescaped filenames

Published Apr 9, 2024 · Updated Aug 2, 2024

Stored cross-site scripting in Contao 4.0.0 through 4.13.39 and 5.0.0 through 5.3.3 allows remote authenticated users to run script in the back end. The file manager passes uploaded file and folder names into back-end tooltip and modal titles without HTML-encoding attribute-significant characters. An untrusted user must be allowed to upload a crafted filename, and a back-end user must view the resulting tooltip or popup, enabling script execution in that viewer’s session.

CVSS severity4.6
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Contao 4.0.0 through 4.13.39 and 5.0.0 through 5.3.3 allows remote authenticated users to run script in the back end. The file manager passes uploaded file and folder names into back-end tooltip and modal titles without HTML-encoding attribute-significant characters. An untrusted user must be allowed to upload a crafted filename, and a back-end user must view the resulting tooltip or popup, enabling script execution in that viewer’s session.

The record

CVE
CVE-2024-28190
Published
Apr 9, 2024
Updated
Aug 2, 2024
Vendor
Contao
Product
Contao
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=>= 4.0.0, < 4.13.40
  2. Affected versionversion=>= 5.0.0, < 5.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Contao · Contaoversion=>= 4.0.0, < 4.13.40; version=>= 5.0.0, < 5.3.4

Published CVSS scores

4.6GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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