How severe is CVE-2013-4390?

CVE-2013-4390 has a CVSS score of 4.7/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2013-4390?

CVE-2013-4390 affects the following packages: org.apache.sling:org.apache.sling.auth.core (Maven). Ecosystems affected: Maven.

How do I fix CVE-2013-4390?

Update org.apache.sling:org.apache.sling.auth.core to 1.1.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-4390 is resolved across your whole dependency graph.

How do I detect CVE-2013-4390 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.sling:org.apache.sling.auth.core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2013-4390 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2013-4390 actively exploited in the wild?

No public exploit code has been indexed for CVE-2013-4390 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2013-4390?

CVE-2013-4390 has an EPSS (Exploit Prediction Scoring System) score of 3.1%, placing it in the 88th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2013-4390?

CVE-2013-4390 is classified as Improper Input Validation (CWE-20). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2013-4390 published, and has it been updated?

CVE-2013-4390 was published on May 17, 2022 and was last updated on February 16, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2013-4390 — org.apache.sling.auth.core

MEDIUMFix: apache/sling-org-apache-sling-auth-core@d1cd9aa

CVE-2013-4390 is a medium-severity (CVSS 4.7) Improper Input Validation vulnerability in org.apache.sling:org.apache.sling.auth.core. A fix is available for org.apache.sling:org.apache.sling.auth.core — see the affected versions and patch details below.

Apache Sling Auth Core bundle vulnerable to Open Redirection

Published

May 17, 2022

Updated

Feb 16, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

3.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs88th percentile — riskier than 88% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

☕org.apache.sling:org.apache.sling.auth.core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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."

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.sling:org.apache.sling.auth.core`	all versions	1.1.4`org.apache.sling:org.apache.sling.auth.core:1.1.4`

Affected Products

2 products · 6 configurations

Application

slingapache

all

Application

sling auth core componentapache

≤ 1.1.2

4 versions

1.0.21.0.41.0.61.1.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.sling:org.apache.sling.auth.core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.sling:org.apache.sling.auth.core to 1.1.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-4390 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2013-4390 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

4.7/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-20Improper Input Validation

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

May 17, 2022

Last updated

Feb 16, 2024

Identifiers

CVE-2013-4390

References

Advisorynvd.nist.gov · CVE 2013 4390 Webgithub.com · d1cd9aaa3432d577b65c50b3fbdc36d5d667ca46 Webissues.apache.org · SLING 3141 Webmail-archives.apache.org · <CAKkCf4qdFxEW9NXBJoMsrBama8LFNyir+61A0Vfzp4njEpeU=w@mail.gmail.com>Websecunia.com Websecurityfocus.com Packagegithub.com · sling org apache sling auth core

Related vulnerabilities

Also affects org.apache.sling.auth.core

This CVE is medium severity; 1 of 1 other CVE affecting org.apache.sling.auth.core is rated as high or higher (top: high).

CVE-2017-15700

Same weakness: CWE-20

This CVE is medium severity; 6 of 7 other CVEs with CWE-20 are rated as high or higher (top: critical).

CVE-2026-62662GHSA-fmc8-p6q7-75ccGHSA-pjff-c2wc-f6jmCVE-2026-44265CVE-2026-119280CVE-2026-96631CVE-2026-119210Browse all CWE-20

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedFeb 16, 2024