CVE-2023-51665Public exploitNetwork attack vector

Unauthenticated blind SSRF via unchecked OpenID issuer

Published Dec 27, 2023 · Updated Aug 2, 2024

Blind SSRF in Auth.js in advplyr Audiobookshelf before 2.7.0 allows remote attackers to make server-originated GET requests. The /auth/openid/config route appends an OpenID discovery path to the unchecked issuer query value and passes the result to axios.get; a trailing question mark places that suffix in the query string. The route requires no authentication, and the request is blind, allowing access to HTTP resources reachable from the server without returning their response body.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Blind SSRF in Auth.js in advplyr Audiobookshelf before 2.7.0 allows remote attackers to make server-originated GET requests. The /auth/openid/config route appends an OpenID discovery path to the unchecked issuer query value and passes the result to axios.get; a trailing question mark places that suffix in the query string. The route requires no authentication, and the request is blind, allowing access to HTTP resources reachable from the server without returning their response body.

The record

CVE
CVE-2023-51665
Published
Dec 27, 2023
Updated
Aug 2, 2024
Vendor
advplyr
Product
Audiobookshelf
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=< 2.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

advplyr · Audiobookshelfversion=< 2.7.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
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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