CVE-2021-39222

mediumPriorität · verfolgen · 24EPSS 0.011 · 65. PerzentilEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.10% (65th) EPSS

CVSS 4.3 · medium

Is it mine?

8 products

Prüfe deine Angriffsfläche

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · bewertet 2026-10-27

Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. It is recommended that the Nextcloud Talk application is upgraded to patched versions 10.0.7, 10.1.4, 11.1.2, 11.2.0 or 12.0.0. As a workaround, use a browser that has support for Content-Security-Policy.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

6.4

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USAusnutzbarkeit 8.6 · Auswirkung 2.9

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USAusnutzbarkeit 2.8 · Auswirkung 2.7

v3.16.4mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.16.4mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:Nsecondary · security-advisories@github.comAusnutzbarkeit 1.2 · Auswirkung 5.2

v3.15.6mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-79USprimärCWE-434US

betroffene Produkte (8)

Betroffene Produkte und Versionsbereiche.

nextcloud security-advisories≤ < 10.0.7enisa_euvdEU
nextcloud security-advisories≤ < 11.2.0enisa_euvdEU
nextcloud security-advisories10.1.0, → 10.1.4enisa_euvdEU
nextcloud security-advisories11.1.0, → 11.1.2enisa_euvdEU
nextcloud security-advisories12.0.0.alpha-1, → 12.0.0enisa_euvdEU
nextcloud talk< 10.0.7nvdUScpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*
nextcloud talk10.1.0 → 10.1.4nvdUScpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*
nextcloud talk11.0.0 → 11.1.2nvdUScpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*

auch bekannt als (2)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

veröffentlicht 2021-11-15geändert 2026-06-17

verwandt (53,046)

Verwandte Einträge.

ID	Schweregrad	EPSS	ausnutzbar	veröffentlicht
CVE-2026-42897US	medium6.1OT kritisch	70.7% (99th)	KEV	2026-05-14
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network…
CVE-2025-66376US	medium6.1OT kritisch	20.2% (97th)	KEV	2026-01-05
Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.
CVE-2025-68461US	medium6.1OT kritisch	27.4% (98th)	KEV	2025-12-18
Roundcube Webmail before 1.5.12 and 1.6 before 1.6.12 is prone to a Cross-Site-Scripting (XSS) vulnerability via the animate tag in an SVG document.
CVE-2025-48700US	—OT kritisch	1.71% (77th)	KEV	2025-06-23
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0 and 10.0 and 10.1. A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to exec…
CVE-2025-27915US	—OT kritisch	4.06% (91st)	KEV	2025-03-12
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. A stored cross-site scripting (XSS) vulnerability exists in the Classic Web Client due to insufficient…

+53041 weitere

Referenzen (12)

Externe Belege — Patches, Meldungen, Analysen.

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