High severity · published Jul 29, 2020
CVE-2020-15098
In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.20, and greater than or equal to 10.0.0 and less than 10.4.6, it has been discovered that an internal verification…
8.8
CVSS
2.2%
EPSS
No
On KEV
Description
In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.20, and greater than or equal to 10.0.0 and less than 10.4.6, it has been discovered that an internal verification mechanism can be used to generate arbitrary checksums. This allows to inject arbitrary data having a valid cryptographic message authentication code (HMAC-SHA1) and can lead to various attack chains including potential privilege escalation, insecure deserialization & remote code execution. The overall severity of this vulnerability is high based on mentioned attack chains and the requirement of having a valid backend user session (authenticated). This has been patched in versions 9.5.20 and 10.4.6.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.2% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TY
Typo3 · Typo3
9.0.0 before 9.5.20; 10.0.0 before 10.4.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15098
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15098
Broken Link
https://github.com/TYPO3/TYPO3.CMS/commit/85d3e70dff35a99ef53f4b561114acfa9e5c47e1
Third Party Advisory
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-m5vr-3m74-jwxp
Vendor Advisory
https://typo3.org/security/advisory/typo3-core-sa-2016-013
Vendor Advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-008
More from Typo3
10.0
CVE-2020-11066
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…
9.8
CVE-2024-45233
An issue was discovered in powermail extension through 12.3.5 for TYPO3
9.8
CVE-2011-3583
It was found that Typo3 Core versions 4.5.0 - 4.5.5 uses prepared statements that, if the parameter values are not properly replaced, could lead to a SQL Injection vulnerability
9.8
CVE-2011-4628
TYPO3 before 4.3.12, 4.4.x before 4.4.9, and 4.5.x before 4.5.4 allows remote attackers to bypass authentication mechanisms in the backend through a crafted request
8.8
CVE-2025-59017
Broken Access Control in Backend AJAX Routes