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TI-2026-42380 Aliases CVE-2026-59239GHSA-wpjv-rrg6-52x9

Stored XSS in Prospero Flow CRM email body allows administrator account takeover

Priority MEDIUM 46CWE-79Published · Updated

Key facts

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

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

Summary

Stored Cross-site Scripting (CWE-79) in the email module in Roskus Prospero Flow CRM before 5.4.4 allows a remote, authenticated low-privileged user to execute arbitrary JavaScript in another user's browser, including administrators, leading to session compromise and account takeover, via a payload stored in an email body that is persisted without sanitization and rendered unescaped with {!! $email->body !!} when the recipient opens the message.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00666 52nd percentileScored 2026-11-07
Fix Fixed Prospero Flow CRM (Roskus): 5.4.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
RoskusProspero Flow CRM1.0.0 to before 5.4.45.4.4Patch availableCNA
  • Prospero Flow CRM VendorRoskus Affected 1.0.0 to before 5.4.4 Fixed in 5.4.4 Patch available CNA

Remediation

  • Fix · CNA Prospero Flow CRM (Roskus) Fixed in 5.4.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59239
  2. 2026-10-03 Alias added: GHSA-wpjv-rrg6-52x9

References

Patch 1

Other 2

  • TI-2026-54500 IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification CVSS 4.0CRITICAL 9.3
  • TI-2026-16110 Use of hard-coded credentials in Prospero Flow CRM employee onboarding CVSS 4.0CRITICAL 9.3
  • TI-2026-42376 Missing authorization in Prospero Flow CRM allows low-privileged users to read all bank accounts CVSS 4.0HIGH 8.7
  • TI-2026-54153 IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records CVSS 4.0HIGH 8.7
  • TI-2026-42374 Missing Authorization in Prospero Flow CRM permission save endpoint allows privilege escalation CVSS 4.0HIGH 8.7
  • TI-2026-16008 IDOR in Prospero Flow CRM allows cross-tenant product disclosure and hijacking CVSS 4.0HIGH 8.6
See all 19 →

Sources

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