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Stored cross-site scripting in Cachet incident form

Priority MEDIUM 55CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Cachet versions through 2.4.1, including the Packagist package cachethq/cachet, contain a stored cross-site scripting flaw in the incident creation form (CWE-79). An authenticated attacker can inject HTML and JavaScript that runs in the browser of any user who views the status page, which can lead to session token theft and account takeover.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Cachet is an open-source status page system. Versions 2.4.1 and earlier have a stored Cross-Site Scripting (XSS) vulnerability in the incident creation form, allowing an authenticated attacker to inject malicious HTML/JavaScript that executes in the browser of any user who views the status page, potentially leading to session token theft and account takeover. Commits 57b44a8bac0b250b0d5751e93e0349070d14606e and 23adbb88ffa819f92be4a905ff1d812670d980a2 in `cachethq/core` patch the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0046 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
cachethqcachetup to 2.4.1—No fix listedCNA
—cachethq/cachet (Packagist)up to 2.4.1—No fix listedGHSA-x397-5hrv-j9m9
  • cachet Vendorcachethq Affected up to 2.4.1 Fixed in — No fix listed CNA
  • cachethq/cachet (Packagist) Vendor— Affected up to 2.4.1 Fixed in — No fix listed GHSA-x397-5hrv-j9m9

Remediation

The sources list no fixed version for Cachet. Commits 57b44a8bac0b250b0d5751e93e0349070d14606e and 23adbb88ffa819f92be4a905ff1d812670d980a2 in cachethq/core patch the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-113712
  2. 2026-10-21 Alias added: GHSA-x397-5hrv-j9m9
  3. 2026-10-21 Affected versions changed · GHSA-x397-5hrv-j9m9
  4. 2026-10-21 CVSS score added · GHSA-x397-5hrv-j9m9
  5. 2026-10-21 Weakness changed · GHSA-x397-5hrv-j9m9
  6. 2026-10-21 4 new references · GHSA-x397-5hrv-j9m9
  7. 2026-10-23 CISA SSVC decision points changed
  8. 2026-10-23 Priority changed: LOW → MEDIUM
  9. 2026-11-06 Affected versions changed · Red Hat
  10. 2026-11-06 CVSS score added · Red Hat

References

  • TI-2026-48523 Cachet 2.4.1 Authenticated Server-Side Template Injection RCE CVSS 4.0HIGH 8.7

Sources