How severe is CVE-2018-15563?

CVE-2018-15563 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2018-15563?

CVE-2018-15563 affects the following packages: intelliants/subrion (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2018-15563?

The records we use list no patched version of intelliants/subrion for CVE-2018-15563. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

How do I detect CVE-2018-15563 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for intelliants/subrion, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2018-15563 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-2018-15563 actively exploited in the wild?

No public exploit code has been indexed for CVE-2018-15563 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-2018-15563?

CVE-2018-15563 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 52th 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-2018-15563?

CVE-2018-15563 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2018-15563 published, and has it been updated?

CVE-2018-15563 was published on October 2, 2018 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

MEDIUM severity

CVE-2018-15563 — subrion

MEDIUM

CVE-2018-15563 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in intelliants/subrion. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Subrion CMS Stored Cross-site Scripting (XSS)

Also known asGHSA-6wc4-v4v5-3m82

Published

Oct 2, 2018

Updated

Oct 24, 2026

Affected

1 pkg

Patched

See advisory

Exploits

None indexed

Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs52th percentile — riskier than 52% 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

🐘intelliants/subrion

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

Description

_core/admin/pages/add/ in Subrion CMS 4.2.1 has XSS via the titles[en] parameter.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`intelliants/subrion`	all versions	No fix

Affected Products

1 product · 1 configurations

Application

subrionintelliants

1 version

4.2.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for intelliants/subrion, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of intelliants/subrion for CVE-2018-15563. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
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

_core/admin/pages/add/ in Subrion CMS 4.2.1 has XSS via the titles[en] parameter.

O3 Security · Impact-Aware SCA

Is CVE-2018-15563 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.1/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

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

OpenSSF Scorecard

Package health score

subrion

3.9/10

Maintained0/10

Code-Review9/10

Branch-ProtectionN/A

Assessed Oct 19, 2026

Timeline

Disclosed

Oct 2, 2018

Last updated

Oct 24, 2026

Identifiers

CVE-2018-15563

GHSA-6wc4-v4v5-3m82

References

Advisorycxsecurity.com · WLB 2018090261 Advisorynvd.nist.gov · CVE 2018 15563 Packagegithub.com · subrion

Related vulnerabilities

This CVE is medium severity; 7 of 8 other CVEs affecting intelliants/subrion are rated as high or higher (top: high).

CVE-2026-12202CVE-2025-70958CVE-2025-56556CVE-2024-25399CVE-2023-46947CVE-2023-43875CVE-2023-43884CVE-2023-43828

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026