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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2025-27621— UpTrain has a Constant Default API Key

Quick assessment

Affected
uptrain-ai uptrain
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.

UpTrain AI UpTrain是UpTrain AI组织开源的一个机器学习模型评估与监控平台。 UpTrain AI UpTrain 0.7.1及之前版本存在授权问题漏洞，该漏洞源于UpTrain后端创建了静态用户名的默认用户，并将用户名用作默认API密钥，同时存在开放的CORS策略，可能导致任意网站通过提供默认API密钥执行特权操作。

CVSS 7.7 · High EPSS 0.46% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
uptrain-ai uptrain <= 0.7.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-27621

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
UpTrain has a Constant Default API Key
Source: CVE Program / CVE List V5
Vulnerability Description
UpTrain is an open-source platform to evaluate and improve generative AI applications. In version 0.7.1 and prior, the UpTrain backend creates a new default user with a static username, where the username is also used as the default API key. The UpTrain backend also has an open CORS policy. Using these two primitives, any website can make a authenticated cross-origin request to the UpTrain instance by providing the default API key in the header `uptrain-access-token`. This issue may allow arbitrary websites to perform privileged operations on the UpTrain instance, as if they were the default logged in user. As of time of publication, no known patches are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
UpTrain AI UpTrain 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UpTrain AI UpTrain是UpTrain AI组织开源的一个机器学习模型评估与监控平台。 UpTrain AI UpTrain 0.7.1及之前版本存在授权问题漏洞，该漏洞源于UpTrain后端创建了静态用户名的默认用户，并将用户名用作默认API密钥，同时存在开放的CORS策略，可能导致任意网站通过提供默认API密钥执行特权操作。
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
uptrain-ai uptrain <= 0.7.1 -

II. Public POCs for CVE-2025-27621

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6569 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-2025-27621

请登录查看更多情报信息。

Patches & Fixes for CVE-2025-27621 (1)

Vendor Advisories for CVE-2025-27621 (1)

Same Patch Batch · uptrain-ai · 2026-08-17 · 4 CVEs total

CVE-2025-27771 7.4 HIGH Uptrain vulnerable to remote code execution via `/add_prompts` endpoint
CVE-2025-27770 7.4 HIGH UpTrain vulnerable to Remote code execution at `/create_project`
CVE-2025-27772 7.4 HIGH Uptrain vulnerable to remote code execution via `/new_run` endpoint

IV. Related Vulnerabilities

Same product: uptrain
Same vendor: uptrain-ai
Same weakness: CWE-287

V. Comments for CVE-2025-27621

No comments yet

Leave a comment