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Fencer Intel
medium 5.4

CVE-2020-11064 json

Cross-Site Scripting in TYPO3 CMS

published 6y ago modified 4mo ago also BIT-typo3-2020-11064 , EUVD-2020-0407 , GHSA-43gj-mj2w-wh46

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
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, it has been discovered that HTML placeholder attributes containing data of other database records are vulnerable to cross-site scripting. A valid backend user account is needed to exploit this vulnerability. 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

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Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N
OSV 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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-79 Improper Neutralization of Input During Web Page Generation

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.