High 8.6Published Jul 27, 2026

CVE-2026-59239Stored XSS in Prospero Flow CRM email body allows administrator account takeover

Updated under an hour ago (Oct 26, 2026, 4:10 AM ET)

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It affects Roskus Prospero Flow CRM. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Roskus Prospero Flow CRM

Exploited in the last 30 days

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.

CVSS: 8.6 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Secur0
NVD analysis: Deferred
Record last updated: Jul 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Roskus Prospero Flow CRM roskus:prospero_flow_crm (from the name)	from 1.0.0 before 5.4.4	CNA record

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.