CVE-2025-6386Network attack vector

Credential inference via nonconstant-time password comparison

Published Jul 7, 2025 · Updated Jul 7, 2025

Timing attack in ParisNeo LoLLMS before 20.1 allows remote attackers to infer usernames and passwords through login response times. The authenticate_user function in lollms_authentication.py compares attacker-supplied password text with stored credentials using ordinary string equality, which exits at the first mismatch and exposes matching-prefix length through execution time. The login interface is reachable without authentication; successful inference discloses credentials, while no integrity or availability impact is reported.

CVSS severity7.5
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Timing attack in ParisNeo LoLLMS before 20.1 allows remote attackers to infer usernames and passwords through login response times. The authenticate_user function in lollms_authentication.py compares attacker-supplied password text with stored credentials using ordinary string equality, which exits at the first mismatch and exposes matching-prefix length through execution time. The login interface is reachable without authentication; successful inference discloses credentials, while no integrity or availability impact is reported.

The record

CVE
CVE-2025-6386
Published
Jul 7, 2025
Updated
Jul 7, 2025
Vendor
ParisNeo
Product
LoLLMS
Classifications
CWE-203, CAPEC-189, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 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=unspecified <20.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ParisNeo · LoLLMSversion=unspecified <20.1

Published CVSS scores

7.5huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-203Observable Discrepancy
CAPEC-189Black Box Reverse Engineering
T1110.001Password Guessing

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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