What is CVE-2025-63807?

CVE-2025-63807 is a critical-severity vulnerability in 2dogz Blogin, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 9.8/10. Published 2025-11-20.

How severe is CVE-2025-63807?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in 2dogz Blogin

CVE-2025-63807

An issue was discovered in weijiang1994 university-bbs (aka Blogin) in commit 9e06bab430bfc729f27b4284ba7570db3b11ce84 (2025-01-13). A weak verification code generation mechanism combined with missing rate limiting allows attackers to perform brute-force attacks on verification codes without authentication. Successful exploitation may result in account takeover via password reset or other authentication bypass methods.

Published 2025-11-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

2dogz Blogin

Weakness classification (CWE)

References

gist.github.com/Rycarl-Furry/3e93c6f0d48a29518adf341e0fc7e2dd (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-63807?: CVE-2025-63807 is a critical-severity vulnerability in 2dogz Blogin, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 9.8/10. Published 2025-11-20.
How severe is CVE-2025-63807?: Critical severity. CVSS v3 base score is 9.8 out of 10.