CVE-2024-34357Network attack vector

Authenticated browser script execution via unencoded file properties

Published May 14, 2024 · Updated Aug 2, 2024

Cross-site scripting in TYPO3 CMS allows remote authenticated users to execute script in another user's browser via crafted file metadata. ShowImageController inserts title, width, and height properties from file entities into tx_cms_showpic HTML marker replacements without HTML encoding. A valid backend account with file-entity access and a victim viewing the generated image output are required, exposing site data and actions available to that victim.

CVSS severity5.4
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site scripting in TYPO3 CMS allows remote authenticated users to execute script in another user's browser via crafted file metadata. ShowImageController inserts title, width, and height properties from file entities into tx_cms_showpic HTML marker replacements without HTML encoding. A valid backend account with file-entity access and a victim viewing the generated image output are required, exposing site data and actions available to that victim.

The record

CVE
CVE-2024-34357
Published
May 14, 2024
Updated
Aug 2, 2024
Vendor
in2code GmbH
Product
TYPO3 CMS
Classifications
CWE-79, CAPEC-63, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 14, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 10.0.0, < 10.4.45
  2. Affected versionversion=>= 11.0.0, < 11.5.37
  3. Affected versionversion=>= 12.0.0, < 12.4.15
  4. Affected versionversion=>= 13.0.0, < 13.1.1
  5. Affected versionversion=>= 9.0.0, < 9.5.48

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

in2code GmbH · TYPO3 CMSversion=>= 10.0.0, < 10.4.45; version=>= 11.0.0, < 11.5.37; version=>= 12.0.0, < 12.4.15; version=>= 13.0.0, < 13.1.1; version=>= 9.0.0, < 9.5.48

Published CVSS scores

5.4GitHubCVSS: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 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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1059.007JavaScript/JScript

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo