CVE-2025-25205

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 4.0%, top 11% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
8.2EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, ssvc poc, public exploit)
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 8.2Exploit: Metasploit · ssvc poc · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Audiobookshelf is a self-hosted audiobook and podcast server. Starting in version 2.17.0 and prior to version 2.19.1, a flaw in the authentication bypass logic allows unauthenticated requests to match certain unanchored regex patterns in the URL. Attackers can craft URLs containing substrings like "/api/items/1/cover" in a query parameter (?r=/api/items/1/cover) to partially bypass authentication or trigger server crashes under certain routes. This could lead to information disclosure of otherwise protected data and, in some cases, a complete denial of service (server crash) if downstream code expects an authenticated user object. Version 2.19.1 contains a patch for the issue.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
78(Attend)
EG Risk 78/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity82% × 45%
Exploitation65% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

February 12, 2025

Last Modified

July 3, 2025

Advisory Details (5)

Auto-updated Sep 8, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_pr.
github Patch Available🟡 PoC Available

Remote Authentication-Bypass can lead to server crash or limited information disclosure due to faulty pattern matching · Advisory · advplyr/audiobookshelf · GitHub

https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-pg8v-5jcv-wrvw
github_pr Patch Available

Improve author image performance

Patch available: advplyr/audiobookshelf v2.19.0 (PR #3584 merged 2024-11-03)

https://github.com/advplyr/audiobookshelf/pull/3584
github_commit Patch Available

commit ec6537656925 (advplyr/audiobookshelf)

Patch available: advplyr/audiobookshelf v2.19.1 (contains commit ec6537656925)

https://github.com/advplyr/audiobookshelf/commit/ec6537656925a43871b07cfee12c9f383844d224
github_commit Patch Available

commit bf8407274e3e (advplyr/audiobookshelf)

Patch available: advplyr/audiobookshelf v2.19.0 (contains commit bf8407274e3e)

https://github.com/advplyr/audiobookshelf/commit/bf8407274e3ee300af1927ee660d078a7a801e1c
generic

audiobookshelf/server/Auth.js at 1a3d70d04100924d41391acb55bd8ddca486a4fa · advplyr/audiobookshelf · GitHub

https://github.com/advplyr/audiobookshelf/blob/1a3d70d04100924d41391acb55bd8ddca486a4fa/server/Auth.js#L17-L41

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 144 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitauxiliary/scanner/http/audiobookshelf_auth_bypass✓ verified
    First seen Feb 12, 2025

    Audiobookshelf Unauthenticated API Authentication Bypass Scanner

    Open source ↗

Frequently asked(5)

What is CVE-2025-25205?
CVE-2025-25205 is a high vulnerability published on February 12, 2025. Audiobookshelf is a self-hosted audiobook and podcast server. Starting in version 2.17.0 and prior to version 2.19.1, a flaw in the authentication bypass logic allows unauthenticated requests to match certain unanchored regex patterns in the URL. Attackers can craft URLs containing substrings like…
When was CVE-2025-25205 disclosed?
CVE-2025-25205 was first published in the National Vulnerability Database on February 12, 2025, with the most recent update on July 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-25205 actively exploited?
CVE-2025-25205 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.5% of all scored CVEs.
What is the CVSS score of CVE-2025-25205?
CVE-2025-25205 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2025-25205?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-25205, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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