AUGUST 24, 2026
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Case File

CVE-2026-53963

HIGH · CVSS 7.3 EPSS 0.50% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-09 · Last synced 2026-08-08

CyberRota Analysis

AI-Generated

The vulnerability affects the Discourse open-source discussion platform, where a maliciously crafted second factor name on an attacker-controlled account can lead to stored cross-site scripting (XSS) when an administrator attempts to impersonate that account. This could allow an attacker to execute arbitrary scripts in the context of the administrator's session, potentially compromising sensitive data or system integrity. Organizations using affected versions should prioritize upgrading to the patched releases (2026.6.0, 2026.5.1, 2026.4.2, or 2026.1.5) to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-53963
Severity
HIGH
CVSS
7.3
EPSS
0.50%

Original NVD Description

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a malicious second factor name on an attacker-controlled account was not escaped in the delete confirmation dialog, allowing stored cross-site scripting when an administrator impersonated that account. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

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