How severe is CVE-2013-4390?

CVE-2013-4390 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2013-4390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4390?

CVE-2013-4390 primarily affects Apache Sling. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4390?

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

When was CVE-2013-4390 published?

CVE-2013-4390 was published on 2013-10-24 and last updated on 2026-06-16.

CVE-2013-4390

CVE-2013-4390 is a medium-severity vulnerability in Apache Sling 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache Sling
Published: 2013-10-24
Last modified: 2026-06-16

Description

Open redirect vulnerability in the AbstractAuthenticationFormServlet in the Auth Core (org.apache.sling.auth.core) bundle before 1.1.4 in Apache Sling allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the resource parameter, related to "a custom login form and XSS."

Frequently asked questions

What is CVE-2013-4390?: Open redirect vulnerability in the AbstractAuthenticationFormServlet in the Auth Core (org.apache.sling.auth.core) bundle before 1.1.4 in Apache Sling allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the resource parameter, related to "a custom login form and XSS."
How severe is CVE-2013-4390?: CVE-2013-4390 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2013-4390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4390?: CVE-2013-4390 primarily affects Apache Sling. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4390?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4390 published?: CVE-2013-4390 was published on 2013-10-24 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:a:apache:sling:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:sling_auth_core_component:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:sling_auth_core_component:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:sling_auth_core_component:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:sling_auth_core_component:1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:sling_auth_core_component:1.1.0:*:*:*:*:*:*:*

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