How severe is CVE-2013-4200?

CVE-2013-4200 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2013-4200 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4200?

CVE-2013-4200 primarily affects Plone. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4200?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-4200 published?

CVE-2013-4200 was published on 2014-01-21 and last updated on 2026-06-16.

CVE-2013-4200

CVE-2013-4200 is a medium-severity vulnerability in Plone with a CVSS 2.0 base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Plone
Published: 2014-01-21
Last modified: 2026-06-16

Description

The isURLInPortal method in the URLTool class in in_portal.py in Plone 2.1 through 4.1, 4.2.x through 4.2.5, and 4.3.x through 4.3.1 treats URLs starting with a space as a relative URL, which allows remote attackers to bypass the allow_external_login_sites filtering property, redirect users to arbitrary web sites, and conduct phishing attacks via a space before a URL in the "next" parameter to acl_users/credentials_cookie_auth/require_login.

Frequently asked questions

What is CVE-2013-4200?: The isURLInPortal method in the URLTool class in in_portal.py in Plone 2.1 through 4.1, 4.2.x through 4.2.5, and 4.3.x through 4.3.1 treats URLs starting with a space as a relative URL, which allows remote attackers to bypass the allow_external_login_sites filtering property, redirect users to arbitrary web sites, and conduct phishing attacks via a space before a URL in the "next" parameter to acl_users/credentials_cookie_auth/require_login.
How severe is CVE-2013-4200?: CVE-2013-4200 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2013-4200 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4200?: CVE-2013-4200 primarily affects Plone. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4200?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4200 published?: CVE-2013-4200 was published on 2014-01-21 and last updated on 2026-06-16.

References

Affected products (46)

cpe:2.3:a:plone:plone:2.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:2.1.4:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.0:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.0.2:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.0.3:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.0.4:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.0.5:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.0.6:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.1.2:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.1.3:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.1.4:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.1.6:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.1.7:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.2:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.2.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.2.2:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.2.3:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.3:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.3.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.3.2:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.3.3:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.3.4:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:3.3.5:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.0:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.0.3:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.0.4:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.0.5:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.0.6.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.1:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.2:*:*:*:*:*:*:*
cpe:2.3:a:plone:plone:4.2.1:*:*:*:*:*:*:*

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