VulnSocial

CVE-2026-53963Disclosure(discourse / discourse)

LOWCVSS 9.0 · CRITICAL

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

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.

discourse CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • discourse

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Affected systems

Vendors
discourse
Products
discourse

1 version affected across 1 product

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-07-10: 2Technical Details · 2026-07-10: 207-10
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-53963 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… https://www.cve.org/CVERecord?id=CVE-2026-53963 ----- Traducción: CVE-2026-53963 Dis… http://infoflow.cloud`

    Post summary

    The post reports a new CVE for Discourse, detailing affected versions and a vulnerability involving malicious second‑factor names, but provides no PoC, exploit, patch, or active exploitation evidence.

    0000048
    91 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-53963 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… https://www.cve.org/CVERecord?id=CVE-2026-53963

    Post summary

    The tweet announces the CVE for Discourse, noting affected versions and hinting at a second‑factor misuse, but it provides no PoC, exploit tool, or evidence of active exploitation.

    00000625
    57.8K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Appdiscoursediscourse---
Appdiscoursediscourse2026.6.0--

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