BookStack unrestricted upload

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.7$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in BookStack. This affects an unknown function. The manipulation results in unrestricted upload. This vulnerability is reported as CVE-2021-3906. The attack can be launched remotely. No exploit exists. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in BookStack (the affected version unknown). It has been classified as critical. Affected is an unknown part. The manipulation with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 10/28/2021. The advisory is available at huntr.dev. This vulnerability is traded as CVE-2021-3906 since 10/26/2021. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1608.002 by the MITRE ATT&CK project.

Applying the patch 64937ab826b56d086af9ecea532510d37520ebc8 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.4
CNA Vector (huntr.dev): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Unrestricted upload
CWE: CWE-434 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 64937ab826b56d086af9ecea532510d37520ebc8

Timelineinfo

10/26/2021 🔍
10/28/2021 +2 days 🔍
10/28/2021 +0 days 🔍
11/01/2021 +4 days 🔍

Sourcesinfo

Advisory: 64937ab826b56d086af9ecea532510d37520ebc8
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3906 (🔍)
GCVE (CVE): GCVE-0-2021-3906
GCVE (VulDB): GCVE-100-185622

Entryinfo

Created: 10/28/2021 13:53
Updated: 11/01/2021 13:17
Changes: 10/28/2021 13:53 (47), 11/01/2021 13:17 (3)
Complete: 🔍
Cache ID: 216::103

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