CVE-2024-56828

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-01-06. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 content after the comma is extracted and decoded using Base64.getDecoder().decode(). The substring from the 11th character up to the first occurrence of a semicolon (;) is assigned to the suffix variable (representing the file extension). The decoded content is then written to a file. However, the file extension is not validated, and since this functionality is exposed to the frontend, it poses significant security risks.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
58%
KEV
Not listed

Published

January 6, 2025

Last Modified

April 21, 2025

Advisory Details (3)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

CVE/ChestnutCMS/CVE-2024-56828.md at main · Zerone0x00/CVE · GitHub

https://github.com/Zerone0x00/CVE/blob/main/ChestnutCMS/CVE-2024-56828.md
generic

ChestnutCMS: ChestnutCMS是前后端分离的内容管理系统。技术栈：SpringBoot4 + VUE3 + MybatisPlus + Freemarker + ES + Redis + MySQL，项目基于RuoYi-Vue重构，集成SaToken鉴权，支持站群管理、多平台静态化、文章/音视频/图集/图书等内容形态、访问统计、多语言、全文检索、仿钉钉工作流审批、前端会员体系等，全面信创适配。

https://gitee.com/liweiyi/ChestnutCMS
generic

栗子网站内容管理系统-企业级JAVA开源CMS

https://www.1000mz.com/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 147 total refreshes for this CVE.

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Frequently asked(5)

What is CVE-2024-56828?
CVE-2024-56828 is a critical vulnerability published on January 6, 2025. 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…
When was CVE-2024-56828 disclosed?
CVE-2024-56828 was first published in the National Vulnerability Database on January 6, 2025, with the most recent update on April 21, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-56828 actively exploited?
CVE-2024-56828 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 42.4% of all scored CVEs.
What is the CVSS score of CVE-2024-56828?
CVE-2024-56828 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-56828?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-56828, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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