GHSA-JMQ3-X8Q7-J9QM

Vulnerability from github – Published: 2026-03-31 22:43 – Updated: 2026-03-31 22:43
VLAI?
Summary
baserCMS has a cross-site scripting vulnerability in blog posts
Details

baserCMS has a cross-site scripting vulnerability in blog posts.

Target

baserCMS 5.2.1 and earlier versions

Vulnerability

Malicious Javascript may be executed in blog posts.

Countermeasures

Update to the latest version of baserCMS

Please refer to the following page to reference for more information. https://basercms.net/security/JVN_20837860

Credits

Gai Tanaka@Mitsui Bussan Secure Directions, Inc.

Severity ?
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.2.2"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "baserproject/basercms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-30879"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-31T22:43:10Z",
    "nvd_published_at": "2026-03-31T01:16:36Z",
    "severity": "MODERATE"
  },
  "details": "baserCMS has a cross-site scripting vulnerability in blog posts.\n\n### Target\nbaserCMS 5.2.1 and earlier versions\n\n### Vulnerability\n\nMalicious Javascript may be executed in blog posts.\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_20837860\n\n### Credits\n\nGai Tanaka@Mitsui Bussan Secure Directions, Inc.",
  "id": "GHSA-jmq3-x8q7-j9qm",
  "modified": "2026-03-31T22:43:10Z",
  "published": "2026-03-31T22:43:10Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-jmq3-x8q7-j9qm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30879"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "baserCMS has a cross-site scripting vulnerability in blog posts"
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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