What is CVE-2026-59239?
CVE-2026-59239 is a Stored Cross-site Scripting (CWE-79) vulnerability in the email module of Roskus Prospero Flow CRM before version 5.4.4. It allows a remote, authenticated low-privileged user to inject and execute arbitrary JavaScript in another user's browser, including administrators. This can lead to session compromise and account takeover; immediate update to version 5.4.4 is recommended.
Related CVEs
link basis: same weakness class CWE-79
FAQ2
What can a threat actor achieve by exploiting CVE-2026-59239?
A remote, authenticated low-privileged user can inject and execute arbitrary JavaScript in another user's browser, including administrators, which can lead to session compromise and account takeover.
What is the recommended mitigation for CVE-2026-59239?
An immediate update to Roskus Prospero Flow CRM version 5.4.4 is recommended.
See also6
This explainer is AI-written from source data — skopnix's own reporting on this CVE; CVSS scores, vendors and versions are never invented. See NVD for the official record.