Sign in
Deutsch English Español Polski
High

TYPO3 CMS Possible Insecure Deserialization in Extbase Request Handling

  • Disclosed: 07.06.2024
  • Updated: 11.10.2026 10:22

It has been discovered that request handling in Extbase can be vulnerable to insecure deserialization. User submitted payload has to be signed with a corresponding HMAC-SHA1 using the sensitive TYPO3 encryptionKey as secret - invalid or unsigned payload is not deserialized.

However, since sensitive information could have been leaked by accident (e.g. in repositories or in commonly known and unprotected backup files), there is the possibility that attackers know the private encryptionKey and are able to calculate the required HMAC-SHA1 to allow a malicious payload to be deserialized.

Requirements for successfully exploiting this vulnerability (all of the following):

  • rendering at least one Extbase plugin in the frontend
  • encryptionKey has been leaked (from LocalConfiguration.php or corresponding .env file)

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package typo3/cms >= 8.0.0, < 8.7.30, >= 9.0.0, < 9.5.12 8.7.30, 9.5.12

References

CVSS score 8.1/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
-
Platform
Composer
Package
typo3/cms
Disclosed
07.06.2024
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-hh95-5xm5-v8v7 - CC BY 4.0

Vulnerability history: typo3/cms

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 (188) in the archive
Total entries
188
First → latest
09.2018 06.2024
Without a fix
3
Exploited in attacks
0

Severity breakdown

  • Critical 6
  • High 41
  • Medium 128
  • Low 13

Disclosures per year

Severity:
  1. TYPO3 Security Misconfiguration in Install Tool Cookie
    High · 8.1 ghsa-f777-f784-36gm >= 7.0.0, < 7.6.32, >= 8.0.0, < 8.7.21, >= 9.0.0, < 9.5.2 7.6.32, 8.7.21, 9.5.2
  2. TYPO3 Arbitrary Code Execution via File List Module
    High · 8.8 ghsa-8h4m-r4wm-xj7r >= 8.0.0, < 8.7.23, >= 9.0.0, < 9.5.4 8.7.23, 9.5.4
  3. TYPO3 Denial of Service in Frontend Record Registration
    High · 7.5 ghsa-g585-crjf-vhwq >= 7.0.0, < 7.6.32, >= 8.0.0, < 8.7.21 7.6.32, 8.7.21
  4. TYPO3 Security Misconfiguration for Backend User Accounts
    High · 7.3 ghsa-c5mj-39cf-3pp5 >= 8.0.0, < 8.7.23, >= 9.0.0, < 9.5.4 8.7.23, 9.5.4
  5. TYPO3 CMS Possible Insecure Deserialization in Extbase Request Handling this entry
    High · 8.1 ghsa-hh95-5xm5-v8v7 >= 8.0.0, < 8.7.30, >= 9.0.0, < 9.5.12 8.7.30, 9.5.12
  6. Insecure Deserialization & Arbitrary Code Execution in TYPO3 CMS
    High ghsa-ppgf-8745-8pgx >= 7.0.0, < 7.6.30, >= 8.0.0, < 8.7.17, >= 9.0.0, < 9.3.2 7.6.30, 8.7.17, 9.3.2
  7. Privilege Escalation & SQL Injection in TYPO3 CMS
    High · 8.8 ghsa-7qwg-fcpw-xg5g >= 8.5.0, < 8.7.17, >= 9.0.0, < 9.3.2 8.7.17, 9.3.2
  8. TYPO3 Remote Code Execution in third party library swiftmailer
    High ghsa-g4pf-3jvq-2gcw >= 6.2.0, < 6.2.30, >= 7.6.0, < 7.6.15, >= 8.0.0, < 8.5.1 6.2.30, 7.6.15, 8.5.1
  9. Arbitrary Code Execution in TYPO3 CMS
    Critical · 9.9 ghsa-67wg-6j7r-mqh8 >= 7.6.0, < 7.6.22, >= 8.0.0, < 8.7.5 7.6.22, 8.7.5
  10. Insecure Deserialization in TYPO3 CMS
    High ghsa-8h28-f46f-m87h >= 8.5.0, < 8.7.17, >= 9.0.0, < 9.3.2 8.7.17, 9.3.2
  11. Missing Access Check in TYPO3 CMS
    Critical · 9.0 ghsa-gwfx-p7mr-f92v >= 6.2.0, < 6.2.25, >= 7.6.0, < 7.6.8, >= 8.0.0, < 8.1.1 6.2.25, 7.6.8, 8.1.1
  12. XML External Entity (XXE) Processing in TYPO3 Core
    High ghsa-qffc-gwpp-m2xr >= 6.2.0, < 6.2.19, >= 7.6.0, < 7.6.4 6.2.19, 7.6.4
  13. TYPO3 SQL Injection in dbal
    High ghsa-9895-53fc-98v2 >= 6.2.0, < 6.2.18 6.2.18
  14. TYPO3 frontend login vulnerable to Session Fixation
    High · 7.1 ghsa-r9vc-jfmh-6j48 >= 6.2.0, < 6.2.14, >= 7.0.0, < 7.3.1 6.2.14, 7.3.1
  15. TYPO3 may allow editors to change, create, or delete metadata of files not within their file mounts
    High · 8.8 ghsa-4r76-xr68-w7m7 >= 6.2.0, < 6.2.14, >= 7.0.0, < 7.3.1 6.2.14, 7.3.1
  16. TYPO3 possible cache poisoning on the homepage when anchors are used
    High ghsa-p84g-j2gh-83g3 >= 6.2.0, < 6.2.9, >= 7.0.0, < 7.0.2 6.2.9, 7.0.2
  17. TYPO3 Arbitrary Shell Execution in Swiftmailer library
    High · 8.1 ghsa-45xg-4w5x-j429 >= 6.2.0, < 6.2.6, >= 6.1.0, < 6.1.12, >= 4.7.0, < 4.7.20, >= 4.5.0, < 4.5.37 6.2.6, 6.1.12, 4.7.20, 4.5.37
  18. TYPO3 is vulnerable to Cross-Site Scripting via frontend rendering
    High · 8.8 CVE-2023-24814 >= 10.0.0, < 10.4.35, >= 11.0.0, < 11.5.23, >= 12.0.0, < 12.2.0 10.4.35, 11.5.23, 12.2.0
  19. TYPO3 vulnerable to Insufficient Session Expiration
    Critical · 9.8 CVE-2022-47406 < 2.0.5, >= 3.0.0, < 3.0.3 2.0.5, 3.0.3
  20. TYPO3 CMS vulnerable to Arbitrary Code Execution via Form Framework
    High · 7.5 CVE-2022-23503 >= 10.0.0, < 10.4.33, >= 11.0.0, < 11.5.20, >= 12.0.0, < 12.1.1 10.4.33, 11.5.20, 12.1.1
Show more (20) Showing 20 of 47

Know which vulnerabilities affect your application

With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.

Connect your application
DockRay newsletter

Application security in your inbox

Important vulnerabilities, actionable guidance and practical advice for your applications. Choose your technologies and follow what matters to your project.

  • A daily digest of new vulnerabilities, critical ones included.
  • Notifications about important updates.
  • Practical advice on application security and monitoring.

Leave empty to receive updates for every technology.

Privacy policy

Free to subscribe. Unsubscribe with one click in any email.