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MEDIUM severity

CVE-2020-19277 — mm-wiki

MEDIUM

CVE-2020-19277 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in github.com/phachon/mm-wiki. 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.

Phachon mm-wiki vulnerable to stored cross-site scripting (XSS)

Also known asGHSA-f7rp-xx67-4pj9
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 28, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2020-19277.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs46th percentile — riskier than 46% of all scored CVEsHighest risk
0.00%0.42%0.85%1.27%0.2%0.5%Apr 26Aug 26Oct 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
🐹github.com/phachon/mm-wiki

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

Description

Phachon mm-wiki v.0.1.2 vulnerable to stored cross-site scripting (XSS). This could allow a remote attacker to execute arbitrary code via JavaScript code in the markdown editor. Any user browsing the document containing XSS malicious code will trigger the vulnerability.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/phachon/mm-wikiall versionsNo fix

Affected Products

1 product · 1 configurations
Application
mm-wikimm-wiki_project
1 version
0.1.2
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.

Cross Site Scripting vulnerability found in Phachon mm-wiki v.0.1.2 allo…

github.comNVDApr 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/phachon/mm-wiki, 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 github.com/phachon/mm-wiki for CVE-2020-19277. 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

Phachon mm-wiki v.0.1.2 vulnerable to stored cross-site scripting (XSS). This could allow a remote attacker to execute arbitrary code via JavaScript code in the markdown editor. Any user browsing the document containing XSS malicious code will trigger the vulnerability.
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CVE-2020-19277: mm-wiki (Medium 5.4)