CVE-2025-3895Network attack vector

Account takeover via predictable password-reset tokens

Published May 23, 2025 · Updated May 23, 2025

Predictable password-reset tokens in MegaBIP 5.19 and earlier allow remote attackers to take over accounts by brute-forcing token values. The password-reset workflow generates tokens from a small random-value space combined with a value that attackers can query. Knowledge of a login name is sufficient to reset that account's password without authentication, including an administrator account.

CVSS severity9.1
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

Predictable password-reset tokens in MegaBIP 5.19 and earlier allow remote attackers to take over accounts by brute-forcing token values. The password-reset workflow generates tokens from a small random-value space combined with a value that attackers can query. Knowledge of a login name is sufficient to reset that account's password without authentication, including an administrator account.

The record

CVE
CVE-2025-3895
Published
May 23, 2025
Updated
May 23, 2025
Vendor
Jan Syski
Product
MegaBIP
Classifications
CWE-334, CAPEC-592, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 23, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jan Syski · MegaBIPversion=0 <=5.19

Published CVSS scores

9.1CERT.PLCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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-334Small Space of Random Values
CAPEC-592Stored XSS
T1110Brute Force

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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