Multiple vulnerabilities in BookStack
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | N/A |
| CWE-ID | CWE-22 CWE-434 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
BookStack Client/Desktop applications / Other client software |
| Vendor | Dan Brown |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Path traversal
EUVDB-ID: #VU57965
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: No
DescriptionThe vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in the uploaded image files. A remote user can send a specially crafted HTTP request and write files to arbitrary directory on the system.
Install update from vendor's website.
Vulnerable software versionsBookStack: 21.04 - 21.10.2
External linkshttp://github.com/BookStackApp/BookStack/releases/tag/v21.10.3
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Dangerous file upload
EUVDB-ID: #VU57966
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-434 - Unrestricted Upload of File with Dangerous Type
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote user to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data when processing HTML attachments. A remote attacker can upload an HTML file to the server and perform phishing attacks. MitigationInstall updates from vendor's website.
Vulnerable software versionsBookStack: 21.04 - 21.10.2
External linkshttp://github.com/BookStackApp/BookStack/releases/tag/v21.10.3
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
