Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2023-39963— Missing password confirmation when creating app passwords

Quick assessment

Affected
nextcloud security-advisories
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Server存在访问控制错误漏洞，该漏洞源于缺少密码确认。

CVSS 8.1 · High EPSS 0.27% · P18
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2023-39963

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Missing password confirmation when creating app passwords
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 20.0.0 and prior to versions 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, a missing password confirmation allowed an attacker, after successfully stealing a session from a logged in user, to create app passwords for the victim. Nextcloud server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Server存在访问控制错误漏洞，该漏洞源于缺少密码确认。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nextcloud security-advisories >= 20.0.0, < 20.0.14.15 -

II. Public POCs for CVE-2023-39963

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 8313 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2023-39963

请登录查看更多情报信息。

Vendor Advisories for CVE-2023-39963 (1)

Other References for CVE-2023-39963 (1)

Same Patch Batch · nextcloud · 2023-08-10 · 10 CVEs total

CVE-2023-39962 7.7 HIGH Users can delete external storage mount points
CVE-2023-39952 6.5 MEDIUM Advanced permissions not respected when copying entire group folders
CVE-2023-39958 5.8 MEDIUM Missing brute force protection on password reset token OAuth2 API controller
CVE-2023-39953 4.8 MEDIUM Issuer not verified from obtained token in user_oidc
CVE-2023-39954 3.8 LOW user_oidc app stores client secret unencrypted in database
CVE-2023-39955 3.5 LOW Notes attachment render HTML in preview mode
CVE-2023-39959 3.5 LOW Existence of calendars and address books can be checked by unauthenticated users
CVE-2023-39961 3.5 LOW Text does not respect "Allow download" permissions
CVE-2023-39957 Path traversal allows tricking the Talk Android app into writing files into it's root dire

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-284

V. Comments for CVE-2023-39963

No comments yet

Leave a comment