Assessment
Why it matters
EPSS is 0.5%; technical severity is CVSS 8.1.
CWE-20: Improper Input Validation in web services in Progress Sitefinity 14.1.x through 14.3.x, 14.4.x before 14.4.8152, 15.0.x before 15.0.8234, 15.1.x before 15.1.8335, 15.2.x before 15.2.8441, 15.3.x before 15.3.8531, and 15.4.x before 15.4.8630 allows a remote unauthenticated attacker to compromise the integrity and confidentiality of user accounts. Successful exploitation requires user interaction and a non-default site configuration.
Who should care
- Teams operating Sitefinity
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Sitefinity is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Vendor advisory from community.progress.com
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- CWE
- CWE-20
- Affected versions
- Progress Sitefinity (Start Including 14.1.7800, End Excluding 14.4.8152 | Start Including 15.0.8200, End Excluding 15.0.8234 | Start Including 15.1.8300, End Excluding 15.1.8335 | Start Including 15.2.8400, End Excluding 15.2.8441)
- Fixed versions
- Progress Sitefinity (Fixed from 14.4.8152, 15.0.8234, 15.1.8335, 15.2.8441, 15.3.8531, 15.4.8630)
- Published
- 2 June 2026
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
Signal timeline
- CVE published
- Latest EPSS score: 0.5%
- Signal calculated at 13