What is CVE-2021-34254?

CVE-2021-34254 is a medium-severity vulnerability in Umbraco Umbraco_cms, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2021-06-28.

How severe is CVE-2021-34254?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-34254 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Open Redirect in Umbraco Umbraco_cms

CVE-2021-34254

Umbraco CMS before 7.15.7 is vulnerable to Open Redirection due to insufficient url sanitization on booting.aspx.

Vulnerability class: Open Redirect

EPSS: 0.007 (48.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Umbraco Umbraco_cms
N/a — versions n/a

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

Public proof-of-concept exploits

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-34254?: CVE-2021-34254 is a medium-severity vulnerability in Umbraco Umbraco_cms, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2021-06-28.
How severe is CVE-2021-34254?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-34254 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.