TI-2020-06697 Aliases CVE-2020-8280 GHSA-v342-j8qr-3849

Cross-site scripting in Nextcloud Contacts

LOW 25CWE-79Published 2021-01-06 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

A missing file type check in Nextcloud Contacts 3.4.0 allows a malicious user to upload SVG files as PNG files to perform cross-site scripting (XSS) attacks.

Why it matters now

EPSS 0.00642 51st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Nextcloud Contacts	Fixed in 3.4.1	—	No fix listed	CNA

Nextcloud Contacts Vendor— Affected Fixed in 3.4.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:nextcloud:contacts::::::::	before 3.4.1	Vulnerable	nextcloud

cpe:2.3:a:nextcloud:contacts:*:*:*:*:*:*:*:* Versions before 3.4.1 Vulnerable ·nextcloud

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-8280
2026-10-03 Alias added: GHSA-v342-j8qr-3849
2026-10-21 EPSS moved to the 50th–90th percentile

References

Exploit 1

https://hackerone.com/reports/998422

Advisory 1

https://nextcloud.com/security/advisory/?id=NC-SA-2020-044

TI-2021-16606 XSS in Contacts CVSS 3.1MEDIUM 6.4
TI-2020-06698 Cross-site scripting in Nextcloud Contacts CVSS 3.1MEDIUM 5.4
TI-2025-40965 Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field CVSS 3.1MEDIUM 5.4
TI-2018-02760 Cross-site scripting in Nextcloud Contacts application CVSS 3.1MEDIUM 4.8
TI-2023-16359 Nextcloud Contacts photos only sanitized if mime type is all lower case CVSS 3.1MEDIUM 4.3
TI-2020-06599 A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars. CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences