CVE-2026-59239

unknowncovered by 1 sourcefirst seen 2026-07-27

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.

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Exploitation outlook

Low exploitation risk0.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2026-59239: Stored Cross-site Scripting (CWE-79) in the email module in Roskus Prospero Flow CRM before 5.…nvd · 2026-07-27

External references

NVD record for CVE-2026-59239

CVE.org record

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