VulnSocial

CVE-2026-90918

LOWCVSS 6.9 · MEDIUM

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

Joomla! Core - [20260908] - Core - XSS in HTML Mail Templates in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - The mail template feature lacks an escaping mechanism, causing XSS vectors in multiple extensions.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • 2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-10-01: 210-01
Referenced assets1 URL
Full discourse2 posts
  • 👻GhostInTheModel👻@onespookyboi

    5/6 The official CVE record credits me as finder and remediation developer. Seeing both lines in there feels pretty damn good. :] https://github.com/CVEProject/cvelistV5/blob/7099c8070495068219bfc8808a8de8e1f01c24bc/cves/2026/90xxx/CVE-2026-90918.json

    1002025
    284 followersView on X
  • 👻GhostInTheModel👻@onespookyboi

    1/6 The HTML escaping was already there. One rendering path never switched it on. -_- That's CVE-2026-90918, an XSS in Joomla's HTML mail templates. I reported it and proposed the fix. Breakdown 🧵

    1000050
    284 followersView on X

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