6.5
MEDIUM
CVE-2021-4194
Bookstack Path Traversal Authentication Bypass
Description

bookstack is vulnerable to Improper Access Control

INFO

Published Date :

Jan. 6, 2022, 6:15 p.m.

Last Modified :

July 25, 2022, 10:24 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2021-4194 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Bookstackapp bookstack
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-4194.

URL Resource
https://github.com/bookstackapp/bookstack/commit/cb0d674a71449de883713db2fcdccb6e108992ad Exploit Third Party Advisory
https://huntr.dev/bounties/0bc8b3f7-9057-4eb7-a989-24cd5689f114 Exploit Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-4194 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-4194 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Reanalysis by [email protected]

    Jul. 25, 2022

    Action Type Old Value New Value
    Removed CWE NIST CWE-668
    Added CWE NIST CWE-863
  • Initial Analysis by [email protected]

    Jan. 13, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
    Changed Reference Type https://github.com/bookstackapp/bookstack/commit/cb0d674a71449de883713db2fcdccb6e108992ad No Types Assigned https://github.com/bookstackapp/bookstack/commit/cb0d674a71449de883713db2fcdccb6e108992ad Exploit, Third Party Advisory
    Changed Reference Type https://huntr.dev/bounties/0bc8b3f7-9057-4eb7-a989-24cd5689f114 No Types Assigned https://huntr.dev/bounties/0bc8b3f7-9057-4eb7-a989-24cd5689f114 Exploit, Third Party Advisory
    Added CWE NIST CWE-668
    Added CPE Configuration OR *cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:* versions up to (excluding) 21.12.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-4194 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-4194 weaknesses.

CAPEC-19: Embedding Scripts within Scripts Embedding Scripts within Scripts CAPEC-441: Malicious Logic Insertion Malicious Logic Insertion CAPEC-478: Modification of Windows Service Configuration Modification of Windows Service Configuration CAPEC-479: Malicious Root Certificate Malicious Root Certificate CAPEC-502: Intent Spoof Intent Spoof CAPEC-503: WebView Exposure WebView Exposure CAPEC-536: Data Injected During Configuration Data Injected During Configuration CAPEC-546: Incomplete Data Deletion in a Multi-Tenant Environment Incomplete Data Deletion in a Multi-Tenant Environment CAPEC-550: Install New Service Install New Service CAPEC-551: Modify Existing Service Modify Existing Service CAPEC-552: Install Rootkit Install Rootkit CAPEC-556: Replace File Extension Handlers Replace File Extension Handlers CAPEC-558: Replace Trusted Executable Replace Trusted Executable CAPEC-562: Modify Shared File Modify Shared File CAPEC-563: Add Malicious File to Shared Webroot Add Malicious File to Shared Webroot CAPEC-564: Run Software at Logon Run Software at Logon CAPEC-578: Disable Security Software Disable Security Software
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.05 }} 0.00%

score

0.19627

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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