How severe is CVE-2025-27112?

No CVSS score has been assigned to CVE-2025-27112 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2025-27112?

CVE-2025-27112 affects the following packages: github.com/navidrome/navidrome (Go). Ecosystems affected: Go.

How do I fix CVE-2025-27112?

Update github.com/navidrome/navidrome to 0.54.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-27112 is resolved across your whole dependency graph.

How do I detect CVE-2025-27112 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/navidrome/navidrome, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2025-27112 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2025-27112 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-27112 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-27112?

CVE-2025-27112 has an EPSS (Exploit Prediction Scoring System) score of 1.0%, placing it in the 63th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-27112?

CVE-2025-27112 is classified as Improper Authentication (CWE-287). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Is there exploit tooling available for CVE-2025-27112?

A Nuclei detection template exists for CVE-2025-27112, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2025-27112 published, and has it been updated?

CVE-2025-27112 was published on February 24, 2025 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

CVE-2025-27112 — navidrome

Fix: navidrome/navidrome@287079a

CVE-2025-27112 is a Improper Authentication vulnerability in github.com/navidrome/navidrome. A fix is available for github.com/navidrome/navidrome — see the affected versions and patch details below.

Navidrome has authentication bypass in Subsonic API with non-existent username

Also known asGHSA-c3p4-vm8f-386pGO-2025-3484

Published

Feb 24, 2025

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-27112.

EPSS Exploitation Probability

via FIRST.org ↗

1.0%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs63th percentile — riskier than 63% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐹github.com/navidrome/navidrome

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Summary

In certain Subsonic API endpoints, authentication can be bypassed by using a non-existent username combined with an empty (salted) password hash. This allows read-only access to the server’s resources, though attempts at write operations fail with a “permission denied” error.

Details

A flaw in the authentication check process allows an attacker to specify any arbitrary username that does not exist on the system, along with a salted hash of an empty password. Under these conditions, Navidrome treats the request as authenticated, granting access to various Subsonic endpoints without requiring valid credentials.

Proof of Concept (PoC)

Generate a random salt:

// e.g., salt = "x1vbudn1m6d"
Math.random().toString(36).substring(2, 15)

Calculate the MD5 hash of an empty password plus the salt:

# Using the example salt above
echo -n "x1vbudn1m6d" | md5sum
81f0c0fb5d202ab0d012e6eaeb722d79  -

Send a request specifying a fake user, with the hash and salt values:

GET https://[host]/rest/getPlaylists?u=FakeUser&t=81f0c0fb5d202ab0d012e6eaeb722d79&s=x1vbudn1m6d&v=1.16.1&c=castafiore&f=json

Impact

An attacker can use any non-existent username to bypass the authentication system and gain access to various read-only data in Navidrome, such as user playlists. However, any attempt to modify data fails due to insufficient permissions, limiting the impact to unauthorized viewing of information.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/navidrome/navidrome`	≥ 0.52.0&&< 0.54.5	0.54.5`go get github.com/navidrome/navidrome@v0.54.5`

Affected Products

1 product · 1 configurations

Application

navidromenavidrome

≥ 0.52.0 && < 0.54.5

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/navidrome/navidrome, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/navidrome/navidrome to 0.54.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-27112 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

How to detect CVE-2025-27112

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2025-27112 -u https://target

Template: Navidrome <=0.54.5 - Authentication Bypass in Subsonic API
Severity: medium
Impact: Attackers can bypass authentication using non-existent usernames and empty password hashes to gain read-only access to user playlists and other data through Subsonic API endpoints.
Remediation: Upgrade to Navidrome version 0.54.5 or later that properly validates authentication credentials.

Template by ProjectDiscovery nuclei-templates (iamnoooob, rootxharsh, pdresearch), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

### Summary In certain Subsonic API endpoints, authentication can be bypassed by using a non-existent username combined with an empty (salted) password hash. This allows read-only access to the server’s resources, though attempts at write operations fail with a “permission denied” error. ### Details A flaw in the authentication check process allows an attacker to specify any arbitrary username that does not exist on the system, along with a salted hash of an empty password. Under these conditions, Navidrome treats the request as authenticated, granting access to various Subsonic endpoints w

O3 Security · Impact-Aware SCA

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