Roskus Prospero Flow CRM · Insecure Direct Object Reference
Source GCVE Database
Not known to be exploited · CVSS 8.6 High : upgrade to 5.4.9 soon.
Data as of 10 Nov 2026, 23:24 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.4.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 11 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Upgrade Prospero Flow CRM to 5.4.9.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| RoskusProspero Flow CRM | Affected
| Fixed in
|
GitHubProspero Flow CRMpkg:github/Prospero Flow CRMOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in Roskus Prospero Flow CRM version 5.4.9 and later. Users should upgrade to version 5.4.9 or newer to remediate this vulnerability. Until upgraded, restrict access to authenticated users and monitor for suspicious ticket access or modifications. No vendor advisory content is provided to indicate alternative mitigations or if no action is required.
Description
An authorization bypass vulnerability exists in the ticket management component of Roskus Prospero Flow CRM versions before 5.4.9. Authenticated users from any company can access, modify, and delete tickets belonging to other companies without proper authorization checks. This occurs because the system fails to restrict ticket operations to the authenticated user's company context, allowing unauthorized access via the ticket's numeric identifier.
References
- nvd.nist.gov/vuln/detail/CVE-2026-19539 (opens in a new tab)
- github.com/Roskus/prospero-flow-crm/commit/b2b6ffdace0972ab62d1f7e8cdab0ed213bfc4a9 (opens in a new tab)
- github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3 (opens in a new tab)
- secur0.com/en/cna/cve-list/cve-2026-19539-idor-in-prospero-flow-crm-allows-cross-tenant-ticket-read-hijacking-and-deletion (opens in a new tab)