Published:2020/05/13  Last Updated:2020/05/13

JVN#41035278
BookStack vulnerable to cross-site scripting

Overview

BookStack contains a cross-site scripting vulnerability.

Products Affected

  • BookStack versions prior to v0.29.2

Description

BookStack contains a cross-site scripting vulnerability (CWE-79).

Impact

An arbitrary script may be executed on the user's web browser.

Solution

Update the Software
Update the software to the latest version according to the information provided by the developer.

The developer states as follows;
After upgrading, The command php artisan bookstack:regenerate-comment-content should be ran to remove any pre-existing dangerous content.

Vendor Status

Vendor Link
BookStackApp / BookStack Cross-Site Scripting Through Comment Creation

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

CVSS v3 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Base Score: 5.4
Attack Vector(AV) Physical (P) Local (L) Adjacent (A) Network (N)
Attack Complexity(AC) High (H) Low (L)
Privileges Required(PR) High (H) Low (L) None (N)
User Interaction(UI) Required (R) None (N)
Scope(S) Unchanged (U) Changed (C)
Confidentiality Impact(C) None (N) Low (L) High (H)
Integrity Impact(I) None (N) Low (L) High (H)
Availability Impact(A) None (N) Low (L) High (H)
CVSS v2 AV:N/AC:M/Au:S/C:N/I:P/A:N
Base Score: 3.5
Access Vector(AV) Local (L) Adjacent Network (A) Network (N)
Access Complexity(AC) High (H) Medium (M) Low (L)
Authentication(Au) Multiple (M) Single (S) None (N)
Confidentiality Impact(C) None (N) Partial (P) Complete (C)
Integrity Impact(I) None (N) Partial (P) Complete (C)
Availability Impact(A) None (N) Partial (P) Complete (C)

Credit

Kenichi Okuno of Mitsui Bussan Secure Directions, Inc reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2020-11055
JVN iPedia JVNDB-2020-000031