High
Safe mode Cross-site Scripting (XSS) vulnerability in Joplin
Type: advisorySources: OSV
Joplin is a free, open source note taking and to-do application. A Cross-site Scripting (XSS) vulnerability allows an untrusted note opened in safe mode to execute arbitrary code. `packages/renderer/MarkupToHtml.ts` renders note content in safe mode by surrounding it with and , without escaping any interior HTML tags. Thus, an attacker can create a note that closes the opening tag, then includes HTML that runs JavaScript. Because the rendered markdown iframe has the same origin as the toplevel document and is not sandboxed, any scripts running in the preview iframe can access the top variable and, thus, access the toplevel NodeJS `require` function. `require` can then be used to import modules like fs or child_process and run arbitrary commands. This issue has been addressed in version 2.12.9 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2023-37898
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 20:50 UTC · Revision 1
Source evidence
Safe mode Cross-site Scripting (XSS) vulnerability in Joplin
core-osv · Original sourcePublished 21 Jun 2024, 19:45 UTC
Joplin is a free, open source note taking and to-do application. A Cross-site Scripting (XSS) vulnerability allows an untrusted note opened in safe mode to execute arbitrary code. `packages/renderer/MarkupToHtml.ts` renders note content in safe mode by surrounding it with and , without escaping any interior HTML tags. Thus, an attacker can create a note that closes the opening tag, then includes HTML that runs JavaScript. Because the rendered markdown iframe has the same origin as the toplevel document and is not sandboxed, any scripts running in the preview iframe can access the top variable and, thus, access the toplevel NodeJS `require` function. `require` can then be used to import modules like fs or child_process and run arbitrary commands. This issue has been addressed in version 2.12.9 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
osv:CVE-2023-37898
Complete source record
{
"id": "f5f1057f41da0488abaaad87d1d7d9ac4881dc4d79f2085c0c9544eff7fb0ea9",
"url": "https://osv.dev/vulnerability/CVE-2023-37898",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Safe mode Cross-site Scripting (XSS) vulnerability in Joplin",
"summary": "Joplin is a free, open source note taking and to-do application. A Cross-site Scripting (XSS) vulnerability allows an untrusted note opened in safe mode to execute arbitrary code. `packages/renderer/MarkupToHtml.ts` renders note content in safe mode by surrounding it with and , without escaping any interior HTML tags. Thus, an attacker can create a note that closes the opening tag, then includes HTML that runs JavaScript. Because the rendered markdown iframe has the same origin as the toplevel document and is not sandboxed, any scripts running in the preview iframe can access the top variable and, thus, access the toplevel NodeJS `require` function. `require` can then be used to import modules like fs or child_process and run arbitrary commands. This issue has been addressed in version 2.12.9 and all users are advised to upgrade. There are no known workarounds for this vulnerability.",
"evidence": "osv:CVE-2023-37898",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2023-37898",
"aliases": [
"CVE-2023-37898",
"GHSA-hjmq-3qh4-g2r8"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/laurent22/joplin",
"type": "GIT",
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{
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
"cpe": "cpe:2.3:a:joplin_project:joplin:*:*:*:*:*:-:*:*",
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-37898.json"
}
}
],
"modified": "2026-10-28T02:30:23.688823787Z",
"provider": "osv",
"references": [
"https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe#sandbox",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37898.json",
"https://github.com/laurent22/joplin/security/advisories/GHSA-hjmq-3qh4-g2r8",
"https://nvd.nist.gov/vuln/detail/CVE-2023-37898"
],
"provider_metadata": {
"cwe_ids": [
"CWE-79"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37898.json"
}
},
"related_cves": [
{
"value": "CVE-2023-37898",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 490008,
"published_at": "2024-06-21T19:45:19.982+00:00"
}