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CVE-2026-19539VulnerabilityPublished

Roskus Prospero Flow CRM · Insecure Direct Object Reference

Source GCVE Database

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Authoritative record:CVE-2026-19539· High 8.6

Not known to be exploited · CVSS 8.6 High : upgrade to 5.4.9 soon.

Data as of 10 Nov 2026, 23:24 UTC

CVSS 4.0 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
RoskusProspero Flow CRMAffected
  • <5.4.9
Fixed in
  • 5.4.9
GitHubProspero Flow CRMpkg:github/Prospero Flow CRMOther threatsAffected
  • <5.4.9
Fixed in
  • 5.4.9

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

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