CVE-2021-42583

mediumpriority · track · 30OT risk · elevatedEPSS 0.007 · 55 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.75% (55th) EPSS

CVSS 5 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

A Broken or Risky Cryptographic Algorithm exists in Max Mazurov Maddy before 0.5.2, which is an unnecessary risk that may result in the exposure of sensitive information.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-327USprimaryCWE-327US

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
foxcpp maddy< 0.5.2nvdUScpe:2.3:a:foxcpp:maddy:*:*:*:*:*:*:*:*
Go github.com/foxcpp/maddy< 0.5.2osvUSpkg:golang/github.com/foxcpp/maddy

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-5r5w-h76p-m726Use of a Broken or Risky Cryptographic Algorithm in Max Mazurov Maddy2022-01-06ghsa · osvUS
A Broken or Risky Cryptographic Algorithm exists in Max Mazurov Maddy before 0.5.2, which is an unnecessary risk that may result in the exposure of sensitive information.
GO-2022-0306Use of a Broken or Risky Cryptographic Algorithm in Max Mazurov Maddy in github.com/foxcpp/maddy2024-08-21vendor · osvUS
Use of a Broken or Risky Cryptographic Algorithm in Max Mazurov Maddy in github.com/foxcpp/maddy

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2021-12-28modified 2026-06-17

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+913 more

references (8)

External citations — patches, advisories, analysis.

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