Bypass of image blocking in Nextcloud Mail

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Lack of ratelimit on public DAV endpoint

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Lack of ratelimit on shareinfo endpoint

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Nextcloud Talk not properly disassociating users from chats after account deletion

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Application specific tokens can change their own scope

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Audit log is not properly logging unsetting of share expiration date

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Filenames not escaped by default in controllers using DownloadResponse

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Ratelimit not applied on OCS API responses

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PT-2021-19898

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions prior to 19.0.13 Nextcloud Server versions prior to 20.0.11 Nextcloud Server versions prior to 21.0.3 Description The issue is related to a lack of ratelimiting on the public share link mount endpoint, which may have...

NextCloud security vulnerabilities

Nextcloud is a set of open source self-hosted file synchronization and sharing communication application platform from Nextcloud, Germany. A security vulnerability in Nextcloud Server in versions prior to 19.0.13, 20.011, and 21.0.3 can be exploited by an attacker to enumerate potentially valid...

CVE-2021-32741: Improper Control of Interaction Frequency

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the public share link mount endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in...

PT-2021-19873 · Nextcloud · Nextcloud Mail

Name of the Vulnerable Software and Affected Versions: Nextcloud Mail versions prior to 1.9.6 Description: The Nextcloud Mail application has an issue where the privacy filter fails to filter images with a background-image CSS attribute, potentially leaking the read state. However, images are sti...

CVE-2021-32707: Improper Input Validation

Nextcloud Mail is a mail app for Nextcloud. In versions prior to 1.9.6, the Nextcloud Mail application does not, by default, render images in emails to not leak the read state. The privacy filter failed to filter images with a background-image CSS attribute. Note that the images were still passed...

CVE-2021-32726: Incorrect Ownership Assignment

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, webauthn tokens were not deleted after a user has been deleted. If a victim reused an earlier used username, the previous user could gain access to their account. The issue was fix...

PT-2021-19858

Name of the Vulnerable Software and Affected Versions Nextcloud Talk versions prior to 11.2.2 Nextcloud Talk versions prior to 11.3.0 can be simplified to the above, as versions prior to 11.2.2 already include versions prior to 11.3.0. Therefore, the simplified version is: Nextcloud Talk versions...

NextCloud cross-site scripting vulnerability

Nextcloud is a set of open source self-hosted file synchronization and sharing communication application platform from Nextcloud, Germany. A cross-site scripting vulnerability exists in Nextcloud Text in versions prior to 19.0.13, 20.0.11 and 21.0.3. No detailed vulnerability details are availabl...

PT-2021-19893

Name of the Vulnerable Software and Affected Versions Nextcloud Text versions prior to 19.0.13 Nextcloud Text versions prior to 20.0.11 Nextcloud Text versions prior to 21.0.3 Description A cross-site scripting issue is present in the Nextcloud Text application. The application uses a text/html...

PT-2021-19894 · Nextcloud +2 · Nextcloud Server +3

Name of the Vulnerable Software and Affected Versions: Nextcloud Server versions prior to 19.0.13 Nextcloud Server versions prior to 20.0.11 Nextcloud Server versions prior to 21.0.3 Description: The Nextcloud Text application shipped with Nextcloud Server returned verbatim exception messages to...

PT-2021-19857 · Nextcloud +2 · Nextcloud Server +2

Name of the Vulnerable Software and Affected Versions: Nextcloud Server versions prior to 19.0.13 Nextcloud Server versions prior to 20.0.11 Nextcloud Server versions prior to 21.0.3 Description: Nextcloud Server is a package that handles data storage and supports application-specific tokens for...

PT-2021-19869 · Nextcloud +2 · Nextcloud Server +2

Name of the Vulnerable Software and Affected Versions: Nextcloud Server versions prior to 19.0.13 Nextcloud Server versions prior to 20.0.11 Nextcloud Server versions prior to 21.0.3 Description: The issue is related to a lack of ratelimiting on the "shareinfo" endpoint, which may have allowed an...