CVE-2026-59239
High
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.
SeverityHigh
CVSS8.6
Exploit probability—
ProductProspero Flow CRM
PublishedJul 27, 2026
First seenJul 27, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- Roskus Prospero Flow CRM5.4.4 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Roskus Prospero Flow CRM | 1.0.0 ≤ v < 5.4.4 | 5.4.4 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.