CVE-2026-63002

Description

REDAXO is a PHP-based content management system. Prior to 5.21.2, redaxo/src/addons/mediapool/pages/sync.php inserts filenames held in $diffFiles from the media filesystem into the Mediapool Sync page without rex_escape(). An attacker who can place an unregistered file with HTML metacharacters in the media directory can execute script in the browser of a backend user with media[sync] permission when that user opens the Sync page, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: MEDIUM
CVSS score: 4.8 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Effective score: 4.8 / 10 MEDIUM source: CNA overview
CWE(s): CWE-79
Reserved: 2026-07-14
Published: 2026-09-23 14:05 UTC
Last updated: 2026-09-23 14:05 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/63xxx/CVE-2026-63002.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 15:17:15 UTC
NVD last modified: 2026-09-23 18:12:04 UTC
NVD CVSS v3.1: 4.8 / 10 MEDIUM source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Exploitability subscore: 1.7 / 10
Impact subscore: 2.7 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85331
Assigner: GitHub_M
Published: Sep 23, 2026, 2:05:39 PM
Updated: Sep 23, 2026, 2:05:39 PM
EUVD base score (CVSS 3.1): 4.8 / 10
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
EUVD-reported EPSS: 0.0000
Vendors: Redaxo
Products: core (< 5.21.2)
Aliases: GHSA-w998-qmw9-mf4m

ENISA description: REDAXO is a PHP-based content management system. Prior to 5.21.2, redaxo/src/addons/mediapool/pages/sync.php inserts filenames held in $diffFiles from the media filesystem into the Mediapool Sync page without rex_escape(). An attacker who can place an unregistered file with HTML metacharacters in the media directory can execute script in the browser of a backend user with media[sync] permission when that user opens the Sync page, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2.

EUVD references (4)

Affected products (1)

Vendor	Product	Versions	Platforms
redaxo	core	`< 5.21.2` (affected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m x_refsource_CONFIRM
https://github.com/redaxo/core/pull/6581 x_refsource_MISC
https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c x_refsource_MISC
https://github.com/redaxo/core/releases/tag/5.21.2 x_refsource_MISC

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (4)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c security-advisories@github.com
https://github.com/redaxo/core/pull/6581 security-advisories@github.com
https://github.com/redaxo/core/releases/tag/5.21.2 security-advisories@github.com
https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m security-advisories@github.com

Remediations (10)

Microsoft Update Catalog

web:catalog.update.microsoft.com

Welcome to the Microsoft Update Catalog site. We want your feedback! Visit our newsgroup or send us an email to provide us with your thoughts and suggestions. To get started using the site, enter in your search terms in the Search box above or visit our FAQ for search tips. |Newsgroup|Send us your feedback

2026-09-24 11:52 UTC
Security Advisories and Bulletins | Microsoft Learn

web:learn.microsoft.com

In this library you will find the following security documents that have been released by the Microsoft Security Response Center (MSRC). The MSRC investigates all reports of security vulnerabilities affecting Microsoft products and services, and releases these documents as part of the ongoing effort to help you manage security risks and help keep your systems protected. Please use the ...

2026-09-24 11:52 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-24 11:52 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-24 11:52 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-24 11:52 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

CVE remediation is fixing known flaws in the software you run. Why upgrading often fails, what remediation actually involves, and how backporting fixes it.

2026-09-24 11:52 UTC
CVE Record: CVE-2026-6302

web:www.cve.org

Vulnerability detail for CVE - 2026 -6302 Description Use after free in Video in Google Chrome prior to 147..7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

2026-09-24 11:52 UTC
Microsoft Technical Security Notifications

web:www.microsoft.com

Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed. You can choose the type of updates for which you want to be notified: Major ...

2026-09-24 11:52 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-24 11:52 UTC
Oracle Critical Security Patch Update Advisory - June 2026

web:www.oracle.com

Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...

2026-09-24 11:52 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-63002.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "core",
          "vendor": "redaxo",
          "versions": [
            {
              "status": "affected",
              "version": "< 5.21.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "REDAXO is a PHP-based content management system. Prior to 5.21.2, redaxo/src/addons/mediapool/pages/sync.php inserts filenames held in $diffFiles from the media filesystem into the Mediapool Sync page without rex_escape(). An attacker who can place an unregistered file with HTML metacharacters in the media directory can execute script in the browser of a backend user with media[sync] permission when that user opens the Sync page, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T14:05:39.056Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/redaxo/core/security/advisories/GHSA-w998-qmw9-mf4m"
        },
        {
          "name": "https://github.com/redaxo/core/pull/6581",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/redaxo/core/pull/6581"
        },
        {
          "name": "https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c"
        },
        {
          "name": "https://github.com/redaxo/core/releases/tag/5.21.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/redaxo/core/releases/tag/5.21.2"
        }
      ],
      "source": {
        "advisory": "GHSA-w998-qmw9-mf4m",
        "discovery": "UNKNOWN"
      },
      "title": "REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-63002",
    "datePublished": "2026-09-23T14:05:39.056Z",
    "dateReserved": "2026-07-14T23:10:57.032Z",
    "dateUpdated": "2026-09-23T14:05:39.056Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}