CVE-2021-31252

What it is

An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, and SEMAC devices from CHIYU Technology that can be exploited by sending a link that has a specially crafted URL to convince the user to click on it.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.

Exploit odds

28.6% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-06-04 21:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 03:51 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 28.6% in the next 30 days (EPSS).
• Severity: 6.1 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-06-04 21:15 UTC

Last modified

2026-06-17 03:51 UTC

Exploit probability

28.6% · EPSS, next 30 days

Weakness

CWE-601

Record status

Modified

Affected

• chiyu-tech bf-430 Firmware
• chiyu-tech bf-431 Firmware
• chiyu-tech bf-450m Firmware
• chiyu-tech Semac s2 Firmware
• chiyu-tech Semac d1 Firmware
• chiyu-tech Semac d2 Firmware
• chiyu-tech Semac d4 Firmware
• chiyu-tech Semac s3v3 Firmware

Attack profile CVSS 3.1 · 6.1

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-31252.md and follow it. Check whether this project is affected by CVE-2021-31252. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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