BIT-discourse-2026-53963: Discourse: Stored-XSS in 2FA delete confirmation modal
Discourse versions prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5 contain a stored cross-site scripting (XSS) vulnerability in the two-factor authentication (2FA) delete confirmation modal. The vulnerability arises because a malicious second factor name on an attacker-controlled account is not properly escaped in the confirmation dialog. This flaw can be triggered when an administrator impersonates the affected account. The issue is fixed in the specified patched versions.
AI Analysis
Technical Summary
Discourse, an open-source discussion platform, has a stored XSS vulnerability (CVE-2026-53963) in the 2FA delete confirmation modal. Specifically, before versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the second factor name controlled by an attacker is not escaped in the delete confirmation dialog. This allows stored cross-site scripting when an administrator impersonates the attacker’s account. The vulnerability is resolved in the listed fixed versions.
Potential Impact
An attacker controlling a second factor name on their account can inject malicious script code that executes in the context of an administrator impersonating that account. This stored XSS could lead to unauthorized actions or credential theft during impersonation. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade Discourse to version 2026.6.0, 2026.5.1, 2026.4.2, or 2026.1.5 or later, as these versions contain the fix for this stored XSS vulnerability. No other mitigation is indicated by the vendor advisory.
BIT-discourse-2026-53963: Discourse: Stored-XSS in 2FA delete confirmation modal
Description
Discourse versions prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5 contain a stored cross-site scripting (XSS) vulnerability in the two-factor authentication (2FA) delete confirmation modal. The vulnerability arises because a malicious second factor name on an attacker-controlled account is not properly escaped in the confirmation dialog. This flaw can be triggered when an administrator impersonates the affected account. The issue is fixed in the specified patched versions.
Affected software
pkg:bitnami/discourseRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Discourse, an open-source discussion platform, has a stored XSS vulnerability (CVE-2026-53963) in the 2FA delete confirmation modal. Specifically, before versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the second factor name controlled by an attacker is not escaped in the delete confirmation dialog. This allows stored cross-site scripting when an administrator impersonates the attacker’s account. The vulnerability is resolved in the listed fixed versions.
Potential Impact
An attacker controlling a second factor name on their account can inject malicious script code that executes in the context of an administrator impersonating that account. This stored XSS could lead to unauthorized actions or credential theft during impersonation. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade Discourse to version 2026.6.0, 2026.5.1, 2026.4.2, or 2026.1.5 or later, as these versions contain the fix for this stored XSS vulnerability. No other mitigation is indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-discourse-2026-53963
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-53963"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Critical
- Cvss Version
- null
Threat ID: 6a58b51a68715ace43db457b
Added to database: 07/16/2026, 10:40:26 UTC
Last enriched: 07/16/2026, 14:29:25 UTC
Last updated: 07/16/2026, 22:57:28 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.