CVE-2021-21338 json
Open Redirection in Login Handling
published 5y ago modified 4mo ago also BIT-typo3-2021-21338 , EUVD-2021-0597 , GHSA-4jhw-2p6j-5wmp
- cvss
- 4.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 0
- none known
Summary
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 it has been discovered that Login Handling is susceptible to open redirection which allows attackers redirecting to arbitrary content, and conducting phishing attacks. No authentication is required in order to exploit this vulnerability. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
Patch / fix
- packagist typo3/cms-core 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1
- packagist typo3/cms 9.5.25, 10.4.14, 11.1.1
- bitnami typo3 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1
- typo3 typo3 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1
Is CVE-2021-21338 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 FencerExploit prediction
1.10% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.7 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | typo3/cms-core | >=6.2.0, <6.2.57 >=7.0.0, <7.6.51 >=8.0.0, <8.7.40 >=10.0.0, <10.4.14 >=11.0.0, <11.1.1 >=9.0.0, <9.5.25 |
6.2.57 7.6.51 8.7.40 10.4.14 11.1.1 9.5.25 |
| packagist | typo3/cms | >=10.0.0, <10.4.14 >=11.0.0, <11.1.1 >=9.0.0, <9.5.25 |
10.4.14 11.1.1 9.5.25 |
| bitnami | typo3 | >=6.2.0, <6.2.57 >=7.0.0, <7.6.51 >=8.0.0, <8.7.40 >=9.0.0, <9.5.25 >=10.0.0, <10.4.14 >=11.0.0, <11.1.1 |
6.2.57 7.6.51 8.7.40 9.5.25 10.4.14 11.1.1 |
Affected products
- TYPO3 TYPO3.CMS
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
typo3.org
/security/advisory/typo3-core-sa-2021-001
web, vendor-advisory
-
github.com
/TYPO3/TYPO3.CMS/security/advisories/GHSA-4jhw-2p6j-5wmp
web, third-party-advisory
-
packagist.org
/packages/typo3/cms-core
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-21338
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21338.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21338.yaml
web
Sources
- CVE List CVE-2021-21338
- GitHub Advisory GHSA-4jhw-2p6j-5wmp
- NVD CVE-2021-21338
- OSV BIT-typo3-2021-21338
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.