What’s Vulnerable › Vulnerabilities

CVE-2016-9465

• Severity: medium (CVSS 5.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-03-28 · updated 2026-06-17
• Weakness: CWE-79

Description

Nextcloud Server before 10.0.1 & ownCloud Server before 9.0.6 and 9.1.2 suffer from Stored XSS in CardDAV image export. The CardDAV image export functionality as implemented in Nextcloud/ownCloud allows the download of images stored within a vCard. Due to not performing any kind of verification on the image content this is prone to a stored Cross-Site Scripting attack.

Affected products

• Nextcloud Server: from 10.0.0 before 10.0.1 — fixed in 10.0.1
• Owncloud: from 9.0.0 before 9.0.6; from 9.1.0 before 9.1.2 — fixed in 9.0.6, 9.1.2

How to fix

Upgrade to a fixed version: Nextcloud Server 10.0.1; Owncloud 9.0.6, 9.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/server/commit/68ab8325c799d20c1fb7e98d670785176590e7d0
• https://github.com/owncloud/core/commit/6bf3be3877d9d9fda9c66926fe273fe79cbaf58e
• https://github.com/owncloud/core/commit/b5a5be24c418033cb2ef965a4f3f06b7b4213845
• https://hackerone.com/reports/163338
• https://nextcloud.com/security/advisory/?id=nc-sa-2016-008
• https://owncloud.org/security/advisory/?id=oc-sa-2016-018
• https://github.com/nextcloud/server/commit/68ab8325c799d20c1fb7e98d670785176590e7d0
• https://github.com/owncloud/core/commit/6bf3be3877d9d9fda9c66926fe273fe79cbaf58e
• https://github.com/owncloud/core/commit/b5a5be24c418033cb2ef965a4f3f06b7b4213845
• https://hackerone.com/reports/163338
• https://nextcloud.com/security/advisory/?id=nc-sa-2016-008
• https://owncloud.org/security/advisory/?id=oc-sa-2016-018

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