VDB-188085 · CVE-2021-3831 · GCVE-0-2021-3831

gnuboard5 Web Page Generation cross site scripting

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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	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.
5.2	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in gnuboard5. The impacted element is an unknown function of the component Web Page Generation Handler. Performing a manipulation results in cross site scripting. This vulnerability is known as CVE-2021-3831. Remote exploitation of the attack is possible. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in gnuboard5 (Forum Software) (affected version not known). This affects some unknown functionality of the component Web Page Generation Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity.

The weakness was published 12/14/2021. The advisory is shared at huntr.dev. This vulnerability is uniquely identified as CVE-2021-3831 since 09/27/2021. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Applying the patch 2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Type

Forum Software

Name

gnuboard5

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (huntr.dev): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d

Timelineinfo

09/27/2021 🔍
12/14/2021 +78 days 🔍
12/14/2021 +0 days 🔍
12/16/2021 +2 days 🔍

Sourcesinfo

Advisory: 2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3831 (🔍)
GCVE (CVE): GCVE-0-2021-3831
GCVE (VulDB): GCVE-100-188085

Entryinfo

Created: 12/14/2021 16:46
Updated: 12/16/2021 12:55
Changes: 12/14/2021 16:46 (49), 12/16/2021 12:47 (3), 12/16/2021 12:55 (1)
Complete: 🔍
Cache ID: 216::103