CVE-2025-25205Public exploitNetwork attack vector

Authentication bypass and crash via URL regex matching

Published Feb 12, 2025 · Updated Feb 13, 2025

Authentication bypass in advplyr Audiobookshelf 2.17.0 through 2.19.0 allows remote attackers to read protected data or crash the server. Auth.authNotNeeded tests unanchored public-route patterns against req.originalUrl, so a public substring in a query parameter skips authentication middleware. No account or user interaction is required; exposed instances can disclose protected endpoint data or terminate when handlers dereference the missing req.user object.

CVSS severity8.2
High
EPSS probability4.75%
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 advplyr Audiobookshelf 2.17.0 through 2.19.0 allows remote attackers to read protected data or crash the server. Auth.authNotNeeded tests unanchored public-route patterns against req.originalUrl, so a public substring in a query parameter skips authentication middleware. No account or user interaction is required; exposed instances can disclose protected endpoint data or terminate when handlers dereference the missing req.user object.

The record

CVE
CVE-2025-25205
Published
Feb 12, 2025
Updated
Feb 13, 2025
Vendor
advplyr
Product
Audiobookshelf
Classifications
CWE-202, CWE-287, CWE-400, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 2.17.0, < 2.19.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

advplyr · Audiobookshelfversion=>= 2.17.0, < 2.19.1

Published CVSS scores

8.2GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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.

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 exploitPublished

Weakness, pattern, technique

CWE-202Exposure of Sensitive Information Through Data Queries
CWE-287Improper Authentication
CWE-400Uncontrolled Resource Consumption
T1190Exploit Public-Facing Application

Public exploit references

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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