CVE-2026-59239
Stored XSS in Prospero Flow CRM email body allows administrator account takeover
- State
- Published
- Severity
- 8.6 High
- Published
- Jul 27, 2026
- Updated
- Jul 27, 2026
- Reserved
- Jul 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | 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 | Secur0 |
Weaknesses
- CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
Affected Products
| Product | Versions |
|---|---|
Prospero Flow CRMRoskus |
|
References
- https://github.com/Roskus/prospero-flow-crm/commit/32efcd5c395ee55119fb9aea502a9d06e4c5adb8patch
- https://github.com/Roskus/prospero-flow-crm/releasesrelease-notes
- https://secur0.com/en/cna/cve-list/cve-2026-59239-stored-xss-in-prospero-flow-crm-email-body-allows-administrator-account-takeovertechnical-description
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