CVE-2026-42887 (GCVE-0-2026-42887)
Vulnerability from cvelistv5
Published
2026-05-11 19:55
Modified
2026-05-12 13:29
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.33.0, a stored cross-site scripting (XSS) vulnerability exists in the Login Page due to improper sanitization of the authLoginCustomMessage field of the /api/auth-settings endpoint. An attacker with administrative privileges can inject arbitrary HTML/JavaScript that will be rendered on the login page for all users. This vulnerability is fixed in 2.33.0.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| advplyr | audiobookshelf |
Version: < 2.33.0 |
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"content": {
"id": "CVE-2026-42887",
"options": [
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{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-12T13:29:23.417280Z",
"version": "2.0.3"
},
"type": "ssvc"
}
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"providerMetadata": {
"dateUpdated": "2026-05-12T13:29:46.446Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"url": "https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
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"product": "audiobookshelf",
"vendor": "advplyr",
"versions": [
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"status": "affected",
"version": "\u003c 2.33.0"
}
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"value": "Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.33.0, a stored cross-site scripting (XSS) vulnerability exists in the Login Page due to improper sanitization of the authLoginCustomMessage field of the /api/auth-settings endpoint. An attacker with administrative privileges can inject arbitrary HTML/JavaScript that will be rendered on the login page for all users. This vulnerability is fixed in 2.33.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
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"descriptions": [
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"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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"providerMetadata": {
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"shortName": "GitHub_M"
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"references": [
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"tags": [
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],
"source": {
"advisory": "GHSA-cx29-ghq2-9cm4",
"discovery": "UNKNOWN"
},
"title": "Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message"
}
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"datePublished": "2026-05-11T19:55:32.090Z",
"dateReserved": "2026-04-30T18:49:06.712Z",
"dateUpdated": "2026-05-12T13:29:46.446Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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