CVE-2026-32734: Baserproject/basercms Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-677c-xv24-crgx
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CVSS 7.1
CWE-79
Published
Advisory Summary

CVE-2026-32734 is a HIGH (CVSS 7.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Baserproject/basercms libraries in the Packagist ecosystem. The issue involves basercms is vulnerable to cross-site scripting. Remediation is available by upgrading affected packages to version 5.2.3.

CVE-2026-32734 at a Glance

CVE Identifier CVE-2026-32734
GHSA Identifier GHSA-677c-xv24-crgx
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Baserproject/basercms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L).

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 Low (A:L)

How to Fix CVE-2026-32734

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

baserproject/basercms fixed: 5.2.3 
Upgrade baserproject/basercms to 5.2.3
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 baserproject/basercms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-32734, inspect your project dependencies for Baserproject/basercms:

inspect dependencies for baserproject/basercms

Analyze the terminal output to locate any version of Baserproject/basercms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.2.3), 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 Baserproject/basercms, 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

baserCMS has DOM-based cross-site scripting in tag creation. ### Target baserCMS 5.2.2 and earlier versions ### Vulnerability Malicious JavaScript may be executed when creating a tag. ### Countermeasures Update to the latest version of baserCMS Please refer to the following page to reference for more information. https://basercms.net/security/JVN_94952030 ### Credits - quanlna2 (Le Nguyen Anh Quan) - namdi (Do Ich Nam) - minhnn42 (Nguyen Ngoc Minh) - VCSLab - Viettel Cyber Security

CVE-2026-32734 Affected Baserproject/basercms Versions

1 component(s)
Fixed Versions:
5.2.3
Product / Package Ecosystem Affected Versions Fixed Version
baserproject/basercms
 Packagist
< 5.2.3
5.2.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/baserproject/basercms/security/advisories/GHSA-677c-xv24-crgx
NVD — CVE-2026-32734 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32734
Baserproject/basercms Security Information SECURITY
https://basercms.net/security/JVN_20837860
Baserproject/basercms Source Repository REPOSITORY
https://github.com/baserproject/basercms
Baserproject/basercms Release RELEASE
https://github.com/baserproject/basercms/releases/tag/5.2.3

Frequently Asked Questions

What is CVE-2026-32734?
CVE-2026-32734 is a security vulnerability in Baserproject/basercms involving baserCMS is Vulnerable to Cross-site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Baserproject/basercms versions are affected?
Affected versions include releases prior to 5.2.3 across affected packages: baserproject/basercms.
What version fixes CVE-2026-32734?
Upgrading to 5.2.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is baserproject/basercms affected?
Yes, baserproject/basercms is affected in releases prior to 5.2.3. Upgrade your dependency to 5.2.3 or later.
What is the CVSS score of CVE-2026-32734?
CVE-2026-32734 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.
What CWE is associated with CVE-2026-32734?
CVE-2026-32734 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-2026-32734?
Run the dependency tree command: 'inspect dependencies for baserproject/basercms'. 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-677c-xv24-crgx",
  "modified" : "2026-03-31T22:52:07Z",
  "published" : "2026-03-31T22:52:07Z",
  "aliases" : [ "CVE-2026-32734" ],
  "summary" : "baserCMS is Vulnerable to Cross-site Scripting",
  "details" : "baserCMS has DOM-based cross-site scripting in tag creation.\n\n### Target\nbaserCMS 5.2.2 and earlier versions\n\n### Vulnerability\n Malicious JavaScript may be executed when creating a tag.\n\n### Countermeasures\nUpdate to the latest version of baserCMS\n\nPlease refer to the following page to reference for more information.\nhttps://basercms.net/security/JVN_94952030\n\n### Credits\n\n- quanlna2 (Le Nguyen Anh Quan)\n- namdi (Do Ich Nam)\n- minhnn42 (Nguyen Ngoc Minh)\n- VCSLab - Viettel Cyber Security",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "baserproject/basercms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.2.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 5.2.2"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/baserproject/basercms/security/advisories/GHSA-677c-xv24-crgx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32734"
  }, {
    "type" : "WEB",
    "url" : "https://basercms.net/security/JVN_20837860"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/baserproject/basercms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/baserproject/basercms/releases/tag/5.2.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-31T22:52:07Z",
    "nvd_published_at" : "2026-03-31T01:16:36Z"
  }
}