CVE-2021-43827

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Source

https://cve.org/CVERecord?id=CVE-2021-43827

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43827.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2021-43827

Aliases

GHSA-58vr-c56v-qr57

Published

2021-12-14T23:15:08.020Z

Modified

2026-07-08T06:29:52.990097957Z

Severity

4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator

Summary

[none]

Details

discourse-footnote is a library providing footnotes for posts in Discourse. ### Impact When posting an inline footnote wrapped in <a> tags (e.g. <a>^[footnote]</a>, the resulting rendered HTML would include a nested <a>, which is stripped by Nokogiri because it is not valid. This then caused a javascript error on topic pages because we were looking for an <a> element inside the footnote reference span and getting its ID, and because it did not exist we got a null reference error in javascript. Users are advised to update to version 0.2. As a workaround editing offending posts from the rails console or the database console for self-hosters, or disabling the plugin in the admin panel can mitigate this issue.

Database specific

{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:a:discourse:discourse_footnote:*:*:*:*:*:discourse:*:*"
            ],
            "source": "CPE_RANGE",
            "vendor_product": "discourse:discourse_footnote",
            "extracted_events": [
                {
                    "fixed": "0.2"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/discourse/discourse-footnote

Affected ranges

Type

GIT

Repo

https://github.com/discourse/discourse-footnote

Events

Introduced

Fixed

796617e0131277011207541313522cd1946661ab

Database specific

{
    "source": "REFERENCES"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43827.json"