CVE-2018-14840: Intelliants/subrion Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-vhqr-3gr2-7px9
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2018-14840 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Intelliants/subrion libraries in the Packagist ecosystem. The issue involves subrion cms cross-site scripting. Remediation is available by upgrading affected packages to version 4.2.2.

CVE-2018-14840 at a Glance

CVE Identifier CVE-2018-14840
GHSA Identifier GHSA-vhqr-3gr2-7px9
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Intelliants/subrion
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2018-14840

To remediate this vulnerability, upgrade all affected Intelliants/subrion dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

intelliants/subrion fixed: 4.2.2 
Upgrade intelliants/subrion to 4.2.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for intelliants/subrion

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-14840, inspect your project dependencies for Intelliants/subrion:

inspect dependencies for intelliants/subrion

Analyze the terminal output to locate any version of Intelliants/subrion in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.2.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Intelliants/subrion, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

`uploads/.htaccess` in Subrion CMS 4.2.1 allows XSS because it does not block .html file uploads (but does block, for example, .htm file uploads).

CVE-2018-14840 Affected Intelliants/subrion Versions

1 component(s)
Fixed Versions:
4.2.2
Product / Package Ecosystem Affected Versions Fixed Version
intelliants/subrion
 Packagist
< 4.2.2
4.2.2

References

NVD — CVE-2018-14840 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-14840
Intelliants/subrion Source Repository REPOSITORY
https://github.com/intelliants/subrion/issues/773
Security Fix Commit FIX COMMIT
https://github.com/intelliants/subrion/commit/b12e287d3814c0f2d0b1892f95fc0190972d2ba5
Security Fix Commit FIX COMMIT
https://github.com/intelliants/subrion/commit/cb10ac2294cb2c3a6d2159f9a2bb8c58a2a10a47
www.exploit-db.com/exploits/45150 WEB
https://www.exploit-db.com/exploits/45150

Frequently Asked Questions

What is CVE-2018-14840?
CVE-2018-14840 is a security vulnerability in Intelliants/subrion involving Subrion CMS Cross-site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Intelliants/subrion versions are affected?
Affected versions include releases prior to 4.2.2 across affected packages: intelliants/subrion.
What version fixes CVE-2018-14840?
Upgrading to 4.2.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is intelliants/subrion affected?
Yes, intelliants/subrion is affected in releases prior to 4.2.2. Upgrade your dependency to 4.2.2 or later.
What is the CVSS score of CVE-2018-14840?
CVE-2018-14840 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2018-14840?
CVE-2018-14840 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2018-14840?
Run the dependency tree command: 'inspect dependencies for intelliants/subrion'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vhqr-3gr2-7px9",
  "modified" : "2023-08-28T23:12:07Z",
  "published" : "2022-05-14T02:00:54Z",
  "aliases" : [ "CVE-2018-14840" ],
  "summary" : "Subrion CMS Cross-site Scripting",
  "details" : "`uploads/.htaccess` in Subrion CMS 4.2.1 allows XSS because it does not block .html file uploads (but does block, for example, .htm file uploads).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "intelliants/subrion"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-14840"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/intelliants/subrion/issues/773"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/intelliants/subrion/commit/b12e287d3814c0f2d0b1892f95fc0190972d2ba5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/intelliants/subrion/commit/cb10ac2294cb2c3a6d2159f9a2bb8c58a2a10a47"
  }, {
    "type" : "WEB",
    "url" : "https://www.exploit-db.com/exploits/45150"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-28T23:12:07Z",
    "nvd_published_at" : "2018-08-02T01:29:00Z"
  }
}