PT-2025-3338 · Unknown · Chestnutcms

Published 2025-01-06 · Updated 2025-04-21 · CVE-2024-56828

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions ChestnutCMS versions prior to 1.5.0

Description The issue concerns a file upload vulnerability where the /api/member/avatar API endpoint receives a base64 string as input, which is then processed by the memberService.uploadAvatarByBase64 method. The base64-encoded image is parsed, and the decoded content is written to a file. However, the file extension is not validated, posing significant security risks since this functionality is exposed to the frontend.

Recommendations For ChestnutCMS versions prior to 1.5.0, as a temporary workaround, consider disabling the memberService.uploadAvatarByBase64 method until a patch is available. Restrict access to the /api/member/avatar endpoint to minimize the risk of exploitation. Avoid using the suffix variable in the affected API endpoint until the issue is resolved.

Exploit

Fix

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2024-56828

Affected Products

Chestnutcms

References · 10

• 🔥 https://github.com/Zerone0x00/CVE/blob/main/ChestnutCMS/CVE-2024-56828.md · Exploit
• https://osv.dev/vulnerability/CVE-2024-56828 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-56828 · Security Note
• https://gitee.com/liweiyi/ChestnutCMS · Note
• https://t.me/cvenotify/107377 · Telegram Post
• https://t.me/cvenotify/119205 · Telegram Post
• https://twitter.com/CVEnew/status/1876332552094441557 · Twitter Post
• https://t.me/cvedetector/14391 · Telegram Post
• https://1000mz.com · Note
• https://twitter.com/VulmonFeeds/status/1876398605897978106 · Twitter Post