Skip to content
Fencer Intel
high 8.7

CVE-2020-11066 json

Improperly Controlled Modification of Dynamically-Determined Object Attributes in TYPO3 CMS

published 6y ago modified last mo. also BIT-typo3-2020-11066 , EUVD-2020-0402 , GHSA-2rxh-h6h9-qrqc

cvss
8.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.17 and greater than or equal to 10.0.0 and less than 10.4.2, calling unserialize() on malicious user-submitted content can lead to modification of dynamically-determined object attributes and result in triggering deletion of an arbitrary directory in the file system, if it is writable for the web server. It can also trigger message submission via email using the identity of the web site (mail relay). Another insecure deserialization vulnerability is required to actually exploit mentioned aspects. This has been fixed in 9.5.17 and 10.4.2.

Patch / fix

  • packagist typo3/cms-core 9.5.17, 10.4.2
  • packagist typo3/cms 9.5.17, 10.4.2
  • bitnami typo3 9.5.17, 10.4.2
  • typo3 typo3 9.5.17, 10.4.2

Is CVE-2020-11066 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

1.51% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H
GitHub 3.1 8.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H
NVD 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:N/I:P/A:P
OSV 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist typo3/cms-core
>=9.0.0, <9.5.17
>=10.0.0, <10.4.2
9.5.17
10.4.2
packagist typo3/cms
>=10.0.0, <10.4.2
>=9.0.0, <9.5.17
10.4.2
9.5.17
bitnami typo3
>=9.0.0, <9.5.17
>=10.0.0, <10.4.2
9.5.17
10.4.2

Affected products

  • TYPO3 TYPO3 CMS

Classification

Weakness
  • CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.