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CVE-2021-23558

Prototype Pollution

7.3 HighFix available

The package bmoor before 0.10.1 are vulnerable to Prototype Pollution due to missing sanitization in set function. Note: This vulnerability derives from an incomplete fix in CVE-2020-7736

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
Low

Exploit likelihood

1.63%Up 0.8 points since Jan 29, 2022
90%50%10%1%

What each source reports

CVE List Score used 7.3

Prototype Pollution

The package bmoor before 0.10.1 are vulnerable to Prototype Pollution due to missing sanitization in set function. Note: This vulnerability derives from an incomplete fix in CVE-2020-7736

Record
CVE-2021-23558
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
Updated
2026-11-02
EUVDEUVD-2022-0816 7.3

The package bmoor before 0.10.1 are vulnerable to Prototype Pollution due to missing sanitization in set function. Note: This vulnerability derives from an incomplete fix in CVE-2020-7736

Record
EUVD-2022-0816
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
Updated
2026-11-03
GitHub AdvisoriesGHSA-4m8h-h59m-m34j 7.3

Prototype Pollution in bmoor

The package bmoor before 0.10.1 is vulnerable to Prototype Pollution due to missing sanitization in set function. Note: This vulnerability derives from an incomplete fix in CVE-2020-7736

Record
GHSA-4m8h-h59m-m34j
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-1321
Updated
2026-11-02
NVD 7.3

The package bmoor before 0.10.1 are vulnerable to Prototype Pollution due to missing sanitization in set function. Note: This vulnerability derives from an incomplete fix in CVE-2020-7736

Record
CVE-2021-23558
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-1321
Updated
2026-11-02
OSV 9.8

The package bmoor before 0.10.1 are vulnerable to Prototype Pollution due to missing sanitization in set function. Note: This vulnerability derives from an incomplete fix in CVE-2020-7736

Record
CVE-2021-23558
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-4m8h-h59m-m34j 7.3

Prototype Pollution in bmoor

The package bmoor before 0.10.1 is vulnerable to Prototype Pollution due to missing sanitization in set function. Note: This vulnerability derives from an incomplete fix in CVE-2020-7736

Record
GHSA-4m8h-h59m-m34j
CVSS 3.1
7.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-1321
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
bmoor
npm
 before 0.10.1
0.10.1

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-23558 is a high vulnerability (CVSS 7.3) in Bmoor Project Bmoor, published January 28, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.63%, the 76th percentile. Fixed in bmoor 0.10.1.

References

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