High
Discourse vulnerable to HTML injection when inviting to topic via email
Type: advisorySources: OSV
Discourse is an open-source discussion platform. Prior to version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch, certain invites via email may result in HTML injection in the email body if the topic title includes HTML. This includes inviting someone (without an account) to a PM and inviting someone (without an account) to a topic with a custom message. This issue is patched in version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch. This can be worked around if the relevant templates are overridden without `{topic_title}`.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-48062
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 01:19 UTC · Revision 1
Source evidence
Discourse vulnerable to HTML injection when inviting to topic via email
core-osv · Original sourcePublished 9 Jun 2025, 12:33 UTC
Discourse is an open-source discussion platform. Prior to version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch, certain invites via email may result in HTML injection in the email body if the topic title includes HTML. This includes inviting someone (without an account) to a PM and inviting someone (without an account) to a topic with a custom message. This issue is patched in version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch. This can be worked around if the relevant templates are overridden without `{topic_title}`.
osv:CVE-2025-48062
Complete source record
{
"id": "6e341737c8e583b736e9b0f4c6e3ec7172d43458690d376ee339f20490e16559",
"url": "https://osv.dev/vulnerability/CVE-2025-48062",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Discourse vulnerable to HTML injection when inviting to topic via email",
"summary": "Discourse is an open-source discussion platform. Prior to version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch, certain invites via email may result in HTML injection in the email body if the topic title includes HTML. This includes inviting someone (without an account) to a PM and inviting someone (without an account) to a topic with a custom message. This issue is patched in version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch. This can be worked around if the relevant templates are overridden without `{topic_title}`.",
"evidence": "osv:CVE-2025-48062",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2025-48062",
"aliases": [
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"CVE-2025-48062",
"GHSA-x8mp-chx3-6x2p"
],
"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"
}
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"modified": "2026-10-28T02:30:32.648170346Z",
"provider": "osv",
"references": [
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}