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Medium

Cross-Site Scripting in ternary conditional operator

  • Disclosed: 08.10.2020
  • Updated: 11.10.2026 10:22

Meta

  • CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C(5.0)
  • CWE-79

:information_source:  This vulnerability has been fixed in May 2019 already, CVE and GHSA were assigned later in October 2020

Problem

It has been discovered that the Fluid Engine (package typo3fluid/fluid) is vulnerable to cross-site scripting when making use of the ternary conditional operator in templates like the following.

{showFullName ? fullName : defaultValue}

Solution

Update to versions 2.0.5, 2.1.4, 2.2.1, 2.3.5, 2.4.1, 2.5.5 or 2.6.1 of this typo3fluid/fluid package that fix the problem described.

Updated versions of this package are bundled in following TYPO3 (typo3/cms-core) releases:

  • TYPO3 v8.7.25 (using typo3fluid/fluid v2.5.5)
  • TYPO3 v9.5.6 (using typo3fluid/fluid v2.6.1)

Credits

Thanks to Bill Dagou who reported this issue and to TYPO3 core merger Claus Due who fixed the issue.

References

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package typo3/cms >= 8.0.0, < 8.7.25, >= 9.0.0, < 9.5.6 8.7.25, 9.5.6
Composer package typo3/cms-core >= 8.0.0, < 8.7.25, >= 9.0.0, < 9.5.6 8.7.25, 9.5.6
Composer package typo3fluid/fluid >= 2.0.0, < 2.0.5, >= 2.1.0, < 2.1.4, >= 2.2.0, < 2.2.1, >= 2.3.0, < 2.3.5, >= 2.4.0, < 2.4.1, >= 2.5.0, < 2.5.5, >= 2.6.0, < 2.6.1 2.0.5, 2.1.4, 2.2.1, 2.3.5, 2.4.1, 2.5.5, 2.6.1

References

CVSS score 4.7/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-601, CWE-79
Platform
Composer
Package
typo3/cms, typo3/cms-core, typo3fluid/fluid
Disclosed
08.10.2020
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-7733-hjv6-4h47 - CC BY 4.0

Vulnerability history: typo3/cms-core

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (128) in the archive
Total entries
128
First → latest
09.2018 09.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 35
  • Medium 84
  • Low 8

Disclosures per year

Severity:
  1. Cross-Site Scripting in ternary conditional operator this entry
    Medium · 4.7 CVE-2020-15241 >= 8.0.0, < 8.7.25, >= 9.0.0, < 9.5.6 8.7.25, 9.5.6
  2. TYPO3 CMS - Broken Access Control in Backend and Install Tool
    High CVE-2026-19418 >= 14.0.0, < 14.3.6 14.3.6
  3. TYPO3 CMS has Broken Access Control in its Form Framework
    High CVE-2026-11607 < 10.4.57, >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
  4. TYPO3 CMS: Destructive Actions on File Mount Folders
    High CVE-2026-47343 < 10.4.57, >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
  5. TYPO3 CMS has Privilege Escalation & SQL Injection in its Form Framework
    High CVE-2026-49741 >= 14.0.0, < 14.3.3 14.3.3
  6. TYPO3 CMS has Broken Access Control in its Form Framework
    High CVE-2026-47346 < 10.4.57, >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
  7. TYPO3 CMS has Broken Access Control in its Media Module
    High CVE-2026-49742 >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 11.5.51, 12.4.46, 13.4.31, 14.3.3
  8. TYPO3 Allows Privilege Escalation to System Maintainer
    High · 7.2 CVE-2025-47940 >= 10.4.0, < 10.4.50, >= 11.0.0, < 11.5.44, >= 12.0.0, < 12.4.31, >= 13.0.0, < 13.4.12 10.4.50, 11.5.44, 12.4.31, 13.4.12
  9. TYPO3 Possible Insecure Deserialization in Extbase Request Handling
    High · 8.1 ghsa-5h5v-m596-r6rf >= 8.0.0, < 8.7.30, >= 9.0.0, < 9.5.12 8.7.30, 9.5.12
  10. TYPO3 Arbitrary Code Execution and Cross-Site Scripting in Backend API
    High · 8.8 ghsa-x428-565f-8xj2 >= 8.0.0, < 8.7.27, >= 9.0.0, < 9.5.8 8.7.27, 9.5.8
  11. TYPO3 Security Misconfiguration in Frontend Session Handling
    High · 8.2 ghsa-82vp-jr39-4j2j >= 8.0.0, < 8.7.27, >= 9.0.0, < 9.5.8 8.7.27, 9.5.8
  12. TYPO3 Arbitrary Code Execution via File List Module
    High · 8.8 ghsa-f9hr-7cfq-mjg2 >= 8.0.0, < 8.7.23, >= 9.0.0, < 9.5.4 8.7.23, 9.5.4
  13. TYPO3 Security Misconfiguration for Backend User Accounts
    High · 7.5 ghsa-rxc9-f2x6-qh4w >= 8.0.0, < 8.7.23, >= 9.0.0, < 9.5.4 8.7.23, 9.5.4
  14. TYPO3 Denial of Service in Frontend Record Registration
    High · 7.5 ghsa-hjx5-v9xg-7h25 >= 8.0.0, < 8.7.21, >= 7.0.0, < 7.6.32 8.7.21, 7.6.32
  15. TYPO3 Security Misconfiguration in Install Tool Cookie
    High · 7.5 ghsa-ppvg-hw62-6ph9 >= 8.0.0, < 8.7.21, >= 9.0.0, < 9.5.2, >= 7.0.0, < 7.6.32 8.7.21, 9.5.2, 7.6.32
  16. TYPO3 CMS Insecure Deserialization
    High · 7.5 ghsa-96jg-pmc4-cx39 >= 8.5.0, < 8.7.17, >= 9.0.0, < 9.3.1 8.7.17, 9.3.1
  17. TYPO3 CMS Privilege Escalation and SQL Injection
    High · 7.5 ghsa-45wj-jv2h-jwrf >= 8.5.0, < 8.7.17, >= 9.0.0, < 9.3.2 8.7.17, 9.3.2
  18. TYPO3 CMS Insecure Deserialization & Arbitrary Code Execution
    Critical · 9.8 ghsa-cc97-g92w-jm65 >= 8.0.0, < 8.7.17, >= 9.0.0, < 9.3.2, >= 7.0.0, < 7.6.30 8.7.17, 9.3.2, 7.6.30
  19. TYPO3 CMS Authentication Bypass vulnerability
    High · 7.5 ghsa-x4rj-f7m6-42c3 >= 8.0.0, < 8.7.17, >= 9.0.0, < 9.3.2, >= 7.0.0, < 7.6.30 8.7.17, 9.3.2, 7.6.30
  20. TYPO3 Install Tool vulnerable to Code Execution
    High · 7.2 CVE-2024-22188 >= 8.0.0, < 8.7.57, >= 9.0.0, < 9.5.46, >= 10.0.0, < 10.4.43, >= 11.0.0, < 11.5.35, >= 12.0.0, < 12.4.11, >= 13.0.0, < 13.0.1 8.7.57, 9.5.46, 10.4.43, 11.5.35, 12.4.11, 13.0.1
  21. TYPO3 vulnerable to Improper Access Control Persisting File Abstraction Layer Entities via Data Handler
    High · 7.1 CVE-2024-25121 >= 8.0.0, < 8.7.57, >= 9.0.0, < 9.5.46, >= 10.0.0, < 10.4.43, >= 11.0.0, < 11.5.35, >= 12.0.0, < 12.4.11, >= 13.0.0, < 13.0.1 8.7.57, 9.5.46, 10.4.43, 11.5.35, 12.4.11, 13.0.1
Show more (16) Showing 21 of 37

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