High severity · published Jul 27, 2026
CVE-2026-59239
Stored XSS in Prospero Flow CRM email body allows administrator account takeover
8.6
CVSS
0.7%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PF
Prospero Flow CRM · Roskus
1.0.0 before 5.4.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59239
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59239
github.com
https://github.com/Roskus/prospero-flow-crm/commit/32efcd5c395ee55119fb9aea502a9d06e4c5adb8
github.com
https://github.com/Roskus/prospero-flow-crm/releases
secur0.com
https://secur0.com/en/cna/cve-list/cve-2026-59239-stored-xss-in-prospero-flow-crm-email-body-allows-administrator-account-takeover
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