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Not in CISA KEV
MEDIUM severity

CVE-2022-31290 — known

MEDIUM

CVE-2022-31290 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in idno/known. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Known v1.3.1 Cross-site Scripting

Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs58th percentile — riskier than 58% of all scored CVEsHighest risk
0.00%0.45%0.91%1.36%0.4%0.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘idno/known

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

A cross-site scripting (XSS) vulnerability in Known v1.3.1 allows authenticated attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Your Name text field.

The researcher report indicates that versions 1.3.1 and prior are vulnerable. Version 1.2.2 is the last version tagged on GitHub and in Packagist, and development related to the 1.3.x branch is currently on the dev branch of the idno/known repository.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistidno/knownall versionsNo fix

Affected Products

1 product · 1 configurations
Application
knownwithknown
≤ 1.3.1
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

A cross-site scripting (XSS) vulnerability in Known v1.2.2+2020061101 al…

blog.jitendrapatro.meNVDJul 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for idno/known, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of idno/known for CVE-2022-31290. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

A cross-site scripting (XSS) vulnerability in Known v1.3.1 allows authenticated attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Your Name text field. The researcher report indicates that versions 1.3.1 and prior are vulnerable. Version 1.2.2 is the last version tagged on GitHub and in Packagist, and development related to the 1.3.x branch is currently on the `dev` branch of the idno/known repository.
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CVE-2022-31290: known: Known v1.3.1 Cross-site Scripting