Medium
Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-42887
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 02:47 UTC · Revision 1
Source evidence
Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message
core-osv · Original sourcePublished 11 May 2026, 19:55 UTC
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.
osv:CVE-2026-42887
Complete source record
{
"id": "1b024be80087a3a5781f9f02684142749fa04a14fdf19f2845635ee06d702f5f",
"url": "https://osv.dev/vulnerability/CVE-2026-42887",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message",
"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.",
"evidence": "osv:CVE-2026-42887",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-42887",
"aliases": [
"CVE-2026-42887",
"GHSA-cx29-ghq2-9cm4"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/advplyr/audiobookshelf",
"type": "GIT",
"events": [
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{
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{
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42887.json"
}
}
],
"modified": "2026-10-28T02:30:49.060419363Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42887.json",
"https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4",
"https://nvd.nist.gov/vuln/detail/CVE-2026-42887"
],
"provider_metadata": {
"cwe_ids": [
"CWE-79"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42887.json"
}
},
"related_cves": [
{
"value": "CVE-2026-42887",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 517485,
"published_at": "2026-05-11T19:55:32.09+00:00"
}