CVE-2021-41113
What it is
TYPO3 is an open source PHP based web content management system released under the GNU GPL. It has been discovered that the new TYPO3 v11 feature that allows users to create and share deep links in the backend user interface is vulnerable to cross-site-request-forgery. The impact is the same as described in TYPO3-CORE-SA-2020-006 (CVE-2020-11069). However, it is not limited to the same site context and does not require the attacker to be authenticated. In a worst case scenario, the attacker could create a new admin user account to compromise the system. To successfully carry out an attack, an attacker must trick his victim to access a compromised system. The victim must have an active session in the TYPO3 backend at that time. The following Same-Site cookie settings in $GLOBALS[TYPO3_CONF_VARS][BE][cookieSameSite] are required for an attack to be successful: SameSite=strict: malicious evil.example.org invoking TYPO3 application at good.example.org and SameSite=lax or none: malicious evil.com invoking TYPO3 application at example.org. Update your instance to TYPO3 version 11.5.0 which addresses the problem described.
At a glance
- Exploitability
- Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.6% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.6% in the next 30 days (EPSS).
- Severity: 8.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.6% · EPSS, next 30 days
- Weakness
- CWE-352 · Cross-site request forgery
- Record status
- Modified
Affected
- typo3 < 11.5.0
Attack profile CVSS 3.1 · 8.8
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-41113.md and follow it. Check whether this project is affected by CVE-2021-41113. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/TYPO3/typo3/commit/fa51999203c5e5d913ecae5ea843ccb2b95fa33f
- https://github.com/TYPO3/typo3/security/advisories/GHSA-657m-v5vm-f6rw
- https://typo3.org/security/advisory/typo3-core-sa-2020-006
- https://github.com/TYPO3/typo3/commit/fa51999203c5e5d913ecae5ea843ccb2b95fa33f
- https://github.com/TYPO3/typo3/security/advisories/GHSA-657m-v5vm-f6rw
- https://typo3.org/security/advisory/typo3-core-sa-2020-006
References
- https://github.com/TYPO3/typo3/commit/fa51999203c5e5d913ecae5ea843ccb2b95fa33f
- https://github.com/TYPO3/typo3/security/advisories/GHSA-657m-v5vm-f6rw
- https://typo3.org/security/advisory/typo3-core-sa-2020-006
- https://github.com/TYPO3/typo3/commit/fa51999203c5e5d913ecae5ea843ccb2b95fa33f
- https://github.com/TYPO3/typo3/security/advisories/GHSA-657m-v5vm-f6rw
- https://typo3.org/security/advisory/typo3-core-sa-2020-006