CVE-2021-43827

Katalog CVE

CVSS 4.3 · Medium EPSS 0,83%

Kerentanan Improper Handling of Exceptional Conditions pada discourse footnote. Skor CVSS 3.1 4.3 (Medium) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

14 Desember 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

4.3 (Medium), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-755: Improper Handling of Exceptional Conditions

EPSS (30 hari)

0,83% peluang dieksploitasi; lebih tinggi dari 56,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/discourse/discourse-footnote/commit/796617e0131277011207541313522cd1946661ab patch · advisory pihak ketiga
• https://github.com/discourse/discourse-footnote/security/advisories/GHSA-58vr-c56v-qr57 advisory pihak ketiga