CVE-2021-37627
No exploitation reported by the sources we read.
- Published2021-08-11
- Fixed in4.11.7 · 4.9.18 · 4.4.56
- WeaknessCWE-269
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Contao is an open source CMS that allows creation of websites and scalable web applications. In affected versions it is possible to gain privileged rights in the Contao back end. Installations are only affected if they have untrusted back end users who have access to the form generator. All users are advised to update to Contao 4.4.56, 4.9.18 or 4.11.7. As a workaround users may disable the form generator or disable the login for untrusted back end users.
Timeline
dates in UTC- 2021-08-1123:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-37627?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-37627?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.11 | ≥ 4.11.0, < 4.11.7 | 4.11.7 | NVD |
| 4.9 | ≥ 4.9.0, < 4.9.18 | 4.9.18 | NVD |
| 4.4 | ≥ 4.4.0, < 4.4.56 | 4.4.56 | NVD |
| 4.0 | = 4.0.0 | no fix published | NVD |
| 4.1 | = 4.1.0 | no fix published | NVD |
| 4.2 | = 4.2.0 | no fix published | NVD |
| 4.3 | = 4.3.0 | no fix published | NVD |
| 4.5 | = 4.5.0 | no fix published | NVD |
| 4.6 | = 4.6.0 | no fix published | NVD |
| 4.7 | = 4.7.0 | no fix published | NVD |
| 4.8 | = 4.8.0 | no fix published | NVD |
| 4.10 | = 4.10.0 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Contao to 4.11.7 · 4.9.18 · 4.4.56
Advisories and patches
- contao.orgVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-08-11
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-37627?
Is CVE-2021-37627 actively exploited?
What is the CVSS score for CVE-2021-37627?
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