PatchTheCVECVE-2024-56828: File Upload vulnerability in ChestnutCMS through 1.5.0
CVE-2024-56828 is a critical-severity flaw (CVSS 9.8) affecting chestnutcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
File Upload vulnerability in ChestnutCMS through 1.5.0. Based on the code analysis, it was determined that the /api/member/avatar API endpoint receives a base64 string as input. This string is then passed to the memberService.uploadAvatarByBase64 method for processing. Within the service, the base64-encoded image is parsed. For example, given a string like: data:image/html;base64,PGh0bWw+PGltZyBzcmM9eCBvbmVycm9yPWFsZXJ0KDEpPjwvaHRtbD4= the conten
Why this priority
- Critical severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.9% (top 40%) |
| CISA exploited list | No |
| Weakness | CWE-434 |
| Published | 2025-01-06 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2024-56828?
chestnutcms: upgrade to newer than 1.5.0. Exact commands for each OS are on this page.
Is CVE-2024-56828 being exploited?
CVE-2024-56828 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2024-56828 affect?
CVE-2024-56828 affects chestnutcms. Severity is critical (CVSS 9.8). File Upload vulnerability in ChestnutCMS through 1.5.0. Based on the code analysis, it was determined that the /api/member/avatar API endpoint receives a base64 string as input. This string is then passed to the memberService.uploadAvatarBy
How urgent is CVE-2024-56828?
Priority 59/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action
Related CVEs
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