yourls 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 (≈)
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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.
4.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in yourls. This affects an unknown part of the component Web Page Generation Handler. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2021-3783. The attack may be initiated remotely. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in yourls (affected version not known) and classified as problematic. This issue affects some unknown functionality of the component Web Page Generation Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity.

The weakness was presented 09/15/2021 as 94f6bab91182142c96ff11f481585b445449efd4. It is possible to read the advisory at huntr.dev. The identification of this vulnerability is CVE-2021-3783 since 09/09/2021. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Applying the patch 94f6bab91182142c96ff11f481585b445449efd4 is able to eliminate this problem. The bugfix is ready for download at github.com.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 2.0
VulDB Temp Score: 1.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.6
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: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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: 94f6bab91182142c96ff11f481585b445449efd4

Timelineinfo

09/09/2021 🔍
09/15/2021 +6 days 🔍
09/15/2021 +0 days 🔍
09/19/2021 +4 days 🔍

Sourcesinfo

Product: github.com

Advisory: 94f6bab91182142c96ff11f481585b445449efd4
Status: Not defined
Confirmation: 🔍

CVE: CVE-2021-3783 (🔍)
GCVE (CVE): GCVE-0-2021-3783
GCVE (VulDB): GCVE-100-182723

Entryinfo

Created: 09/15/2021 16:45
Updated: 09/19/2021 08:09
Changes: 09/15/2021 16:45 (49), 09/19/2021 08:04 (2), 09/19/2021 08:09 (1)
Complete: 🔍
Cache ID: 216::103

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