Nucleus CMS v3.71 is affected by a file upload vulnerability.
Priority LOW 34CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.
Summary
Nucleus CMS v3.71 is affected by a file upload vulnerability. In this vulnerability, we can use upload to change the upload path to the path without the Htaccess file. Upload an Htaccess file and write it to AddType application / x-httpd-php.jpg. In this way, an attacker can upload a picture with shell, treat it as PHP, execute commands, so as to take down website resources.
Why it matters now
EPSS 0.01332 71st percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nucleuscms:nucleus_cms:3.71:*:*:*:*:*:*:* | 3.71 | Vulnerable | Nucleuscms |
- cpe:2.3:a:nucleuscms:nucleus_cms:3.71:*:*:*:*:*:*:* Versions 3.71 Vulnerable ·Nucleuscms
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-37770
- 2026-10-03 Alias added: GHSA-5xq9-crf7-769q
References
More Nucleuscms Nucleus Cms vulnerabilities
- TI-2018-11923 Nucleus CMS 3.70 allows HTML Injection via the index.php body parameter. CVSS 3.0MEDIUM 6.5
- TI-2011-03317 Nucleus 3.61 allows remote attackers to obtain sensitive information via a direct request… CVSS 2.0MEDIUM 5.0
- TI-2015-04588 Cross-site scripting (XSS) vulnerability in Nucleus CMS allows remote attackers to inject… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2021-37770 · CVE Program
- CVE-2021-37770 · NVD
- FIRST EPSS
- GHSA-5xq9-crf7-769q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences