CVE-2026-5484: Improper Access Controls in BookStackApp BookStack
CVE-2026-5484 is a medium severity vulnerability in BookStackApp BookStack version 26. 03 affecting the chapterToMarkdown function in the Chapter Export Handler. Improper access controls due to manipulation of the 'pages' argument can be exploited remotely. The vendor has released a fixed version 26. 03. 1 that addresses this issue. Users are advised to upgrade to this patched version to mitigate the vulnerability.
AI Analysis
Technical Summary
This vulnerability involves improper access controls in the chapterToMarkdown function of the app/Exports/ExportFormatter.php file within BookStackApp BookStack up to version 26.03. By manipulating the 'pages' argument, an attacker can bypass access restrictions remotely. The vendor responded promptly and released version 26.03.1 containing a patch identified by commit 8a59895ba063040cc8dafd82e94024c406df3d04 to fix the issue.
Potential Impact
An attacker can remotely exploit this vulnerability to bypass access controls related to chapter export functionality, potentially accessing or exporting content without proper authorization. The CVSS 4.0 base score is 6.9, indicating a medium severity impact with network attack vector, no privileges or user interaction required, and low impact on confidentiality.
Mitigation Recommendations
Upgrade BookStackApp BookStack to version 26.03.1 or later, which contains the official fix for this vulnerability. Applying this update fully mitigates the risk. No additional vendor advisories indicate alternative mitigations or that no action is required.
CVE-2026-5484: Improper Access Controls in BookStackApp BookStack
Description
CVE-2026-5484 is a medium severity vulnerability in BookStackApp BookStack version 26. 03 affecting the chapterToMarkdown function in the Chapter Export Handler. Improper access controls due to manipulation of the 'pages' argument can be exploited remotely. The vendor has released a fixed version 26. 03. 1 that addresses this issue. Users are advised to upgrade to this patched version to mitigate the vulnerability.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper access controls in the chapterToMarkdown function of the app/Exports/ExportFormatter.php file within BookStackApp BookStack up to version 26.03. By manipulating the 'pages' argument, an attacker can bypass access restrictions remotely. The vendor responded promptly and released version 26.03.1 containing a patch identified by commit 8a59895ba063040cc8dafd82e94024c406df3d04 to fix the issue.
Potential Impact
An attacker can remotely exploit this vulnerability to bypass access controls related to chapter export functionality, potentially accessing or exporting content without proper authorization. The CVSS 4.0 base score is 6.9, indicating a medium severity impact with network attack vector, no privileges or user interaction required, and low impact on confidentiality.
Mitigation Recommendations
Upgrade BookStackApp BookStack to version 26.03.1 or later, which contains the official fix for this vulnerability. Applying this update fully mitigates the risk. No additional vendor advisories indicate alternative mitigations or that no action is required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-03T13:10:53.751Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d01c5f0a160ebd9254ff70
Added to database: 4/3/2026, 8:00:31 PM
Last enriched: 4/3/2026, 8:15:28 PM
Last updated: 4/4/2026, 1:11:45 AM
Views: 4
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