Nim up to 1.6.1 RST Module cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Nim up to 1.6.1. Impacted is an unknown function of the component RST Module. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2021-46872. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Nim up to 1.6.1. This affects an unknown functionality of the component RST Module. 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 summary by CVE is:

An issue was discovered in Nim before 1.6.2. The RST module of the Nim language stdlib, as used in NimForum and other products, permits the javascript: URI scheme and thus can lead to XSS in some applications. (Nim versions 1.6.2 and later are fixed; there may be backports of the fix to some earlier versions. NimForum 2.2.0 is fixed.)

The weakness was shared 01/13/2023. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2021-46872 since 01/13/2023. 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.

Upgrading to version 1.6.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 46275126b89218e64844eee169e8ced05dd0e2d7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

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

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nim 1.6.2
Patch: 46275126b89218e64844eee169e8ced05dd0e2d7

Timelineinfo

01/13/2023 🔍
01/13/2023 +0 days 🔍
01/13/2023 +0 days 🔍
04/07/2025 +815 days 🔍

Sourcesinfo

Advisory: 46275126b89218e64844eee169e8ced05dd0e2d7
Status: Confirmed

CVE: CVE-2021-46872 (🔍)
GCVE (CVE): GCVE-0-2021-46872
GCVE (VulDB): GCVE-100-218289

Entryinfo

Created: 01/13/2023 13:39
Updated: 04/07/2025 23:17
Changes: 01/13/2023 13:39 (42), 02/05/2023 21:21 (1), 02/05/2023 21:32 (11), 04/07/2025 23:17 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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