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TI-2026-30513 Aliases CVE-2026-42192

Plunk: Stored XSS in campaign view

Priority LOW 24CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Plunk is an open-source email platform built on top of AWS SES. Prior to version 0.9.0, a stored cross-site scripting (XSS) vulnerability exists in the campaign management feature, where the email body content created by authenticated project members is stored and later rendered in the admin dashboard using React's dangerouslySetInnerHTML without any HTML sanitization. This allows a lower-privileged member to embed malicious scripts in a campaign's email body that execute in the context of any admin or other member who views the campaign, potentially enabling session hijacking or unauthorized actions on their behalf. This issue has been patched in version 0.9.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00176 7th percentileScored 2026-11-07
Fix Fixed plunk (useplunk): 0.9.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
useplunkplunkbefore 0.9.00.9.0Patch availableCNA
  • plunk Vendoruseplunk Affected before 0.9.0 Fixed in 0.9.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:useplunk:plunk:*:*:*:*:*:*:*:*——useplunk
  • cpe:2.3:a:useplunk:plunk:*:*:*:*:*:*:*:* Versions — — ·useplunk

Remediation

  • Fix · CNA plunk (useplunk) Fixed in 0.9.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42192

References

Other 2

  • TI-2026-30514 Plunk: SNS webhook forgery CVSS 3.1CRITICAL 9.1
  • TI-2026-24634 Plunk has SSRF via unvalidated AWS SNS SubscriptionConfirmation in POST /webhooks/sns CVSS 3.1CRITICAL 9.3
  • TI-2026-27197 Plunk has a CRLF Email Header Injection in raw MIME message construction allows… CVSS 3.1HIGH 8.5
  • TI-2026-24633 Plunk has Stored Cross-Site Scripting (XSS) via SVG File Upload CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences