CVE-2026-59239

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

Published Jul 27, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

Upgrade to version 5.4.4 or higher.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Description 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.
Title Stored XSS in Prospero Flow CRM email body allows administrator account takeover
First Time appeared Roskus
Roskus prospero Flow Crm
Weaknesses CWE-79
CPEs cpe:2.3:a:roskus:prospero_flow_crm:*:*:*:*:*:*:*:*
Vendors & Products Roskus
Roskus prospero Flow Crm
References
Metrics cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:L/SA:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Secur0
Published
Updated
Jul 27, 2026, 6:31 PM
Reserved
Jul 3, 2026, 11:24 AM
Status
Deferred
Published
Jul 27, 2026, 6:16 PM
Modified
Oct 24, 2026, 1:10 PM