CVE-2026-59239

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.

Score

CVSS 4.0 8.6 High

Status

Deferred - 4daa8cea-433a-44bd-9456-53b127fc289a

Published

2026-07-27

Last modified

2026-10-24

Weaknesses

CWE-79

Affected products

• Prospero Flow Crm (Roskus)

References

• https://github.com/Roskus/prospero-flow-crm/commit/32efcd5c395ee55119fb9aea502a9d06e4c5adb8
• https://github.com/Roskus/prospero-flow-crm/releases
• https://secur0.com/en/cna/cve-list/cve-2026-59239-stored-xss-in-prospero-flow-crm-email-body-allows-administrator-accou…