Stored XSS in Prospero Flow CRM email body allows administrator account takeover
Summary
| CVE | CVE-2026-59239 |
|---|---|
| State | PUBLISHED |
| Assigner | Secur0 |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-27 18:16:57 UTC |
| Updated | 2026-07-27 19:17:17 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 8.6 HIGH from 4daa8cea-433a-44bd-9456-53b127fc289a
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-79 | CWE-79 CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | 4daa8cea-433a-44bd-9456-53b127fc289a | Secondary | 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/E:X/C... |
| 4.0 | CNA | CVSS | 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 |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
NoneUser Interaction
PassiveConfidentiality
HighIntegrity
HighAvailability
NoneSub Conf.
NoneSub Integrity
LowSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Roskus | Prospero Flow CRM | affected 1.0.0 5.4.4 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/Roskus/prospero-flow-crm/releases | 4daa8cea-433a-44bd-9456-53b127fc289a | github.com | |
| secur0.com/en/cna/cve-list/cve-2026-59239-stored-xss-in-prospero-flow-cr... | 4daa8cea-433a-44bd-9456-53b127fc289a | secur0.com | |
| github.com/Roskus/prospero-flow-crm/commit/32efcd5c395ee55119fb9aea502a9... | 4daa8cea-433a-44bd-9456-53b127fc289a | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Robert Mihaila (en)
CNA: Amirreza Fadaeizadeh Bidari (en)
CNA: Cristian Fernandez Cornejo (en)
CNA: Xoán M. Otero Jorge (en)
CNA: Secur0 CNA (en)
CNA: Gustavo Novaro (en)
Additional Advisory Data
Solutions
CNA: Upgrade to version 5.4.4 or higher.
There are currently no legacy QID mappings associated with this CVE.