CVE-2025-63807Network attack vector

Account takeover via brute-forced reset codes

Published Nov 20, 2025 · Updated Nov 21, 2025

Authentication bypass in weijiang1994 Blogin allows remote attackers to take over accounts through the password-reset workflow. The POST /reset-confirm/ handler in blogin/blueprint/front/auth.py accepts guesses for six-digit codes generated with a noncryptographic PRNG without rate limits or session binding. No authentication is required; a correct guess permits the attacker to set a new password for the targeted account.

CVSS severity9.8
Critical
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in weijiang1994 Blogin allows remote attackers to take over accounts through the password-reset workflow. The POST /reset-confirm/ handler in blogin/blueprint/front/auth.py accepts guesses for six-digit codes generated with a noncryptographic PRNG without rate limits or session binding. No authentication is required; a correct guess permits the attacker to set a new password for the targeted account.

The record

CVE
CVE-2025-63807
Published
Nov 20, 2025
Updated
Nov 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-307, CWE-1390, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
CWE-1390Weak Authentication
T1110Brute Force

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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