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Bug bounty reports15,219

Publicly disclosed HackerOne reports, with the platform's own outcome and severity.

Program:Nextcloud
Status:Valid
Clear
Severity
Weakness
Year:2016
Clear
Bounty paid3
Access stated
Access needed
Technique
Clear filters47 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Stored XSS on Share-popup of a directory's Gallery-viewAnalysed#145355ValidCross-site Scripting–2016-07-19–24
Log pollution can lead to HTML Injection.Analysed#146278ValidCross-site Scripting–2016-07-19–18
Response Header injection using redirect_uri together with PHP that utilizes Header Folding according to RFC1945 and Internet Explorer 11Analysed#145392ValidMisconfiguration and Insecure Design–2016-08-17–18
Content spoofing in lookup.nextcloud.com#171497ValidMisconfiguration and Insecure DesignLow2016-10-10–11
Uploading files to a folder where invited user don't have any EDIT privilege#145950ValidAuthentication–2016-07-19–10
\OCA\DAV\CardDAV\ImageExportPlugin allows serving arbitrary data with user-defined or empty mimetype#163338ValidCross-site ScriptingMedium2016-12-03–9
Password Reset Link issue#161924ValidAuthentication–2016-09-23–9
IDOR - Disable sharing#153905ValidAccess ControlLow2016-12-03–8
Content (Text) Injection at NextCloud Server 9.0.52 - via http://custom_nextcloud_url/remote.php/dav/files/#149798ValidMisconfiguration and Insecure DesignLow2016-12-02–8
Reflected XSS in Gallery App#165686ValidCross-site ScriptingMedium2016-12-03–7
Wordpress: Directory Traversal / Denial of Serivce#163421ValidInformation Disclosure–2016-08-26–7
Expired SSL certificate#163342ValidMisconfiguration and Insecure Design–2016-08-25–7
Read-only share recipient can restore old versions of file#146067ValidAuthentication–2016-07-19$3007
Password reset link remains valid after email change#145896ValidAuthentication–2016-12-13–7
Directory listening enabled in: 88.198.160.130#156510ValidInformation Disclosure–2016-09-04–6
Share owner has no possibility to list all existing derived shares#145452ValidAuthentication–2016-12-13–6
Information Disclosure of .htaccess file in Private Server/Subdomain#163106ValidInformation Disclosure–2016-08-26–5
More content spoofing through dir param in the files app#154827ValidMisconfiguration and Insecure DesignLow2016-11-04$505
nextcloud.com: Content Injection Custom 404 Error#145344ValidMisconfiguration and Insecure Design–2016-06-17–5
Stored XSS on new Calling plugin (spreed)#190870ValidCross-site ScriptingHigh2016-12-13–4
Content spoofing due to the improper behavior of the 403 page in Private Server#177335ValidMisconfiguration and Insecure DesignNone2016-10-31–4
Bookmarks: Delete all existing bookmarks of a user#154529ValidAccess Control–2016-08-08–4
[Thirdparty] Stored XSS in chat module - nextcloud server 9.0.51 installed in ubuntu 14.0.4 LTS#148897ValidCross-site ScriptingMedium2016-11-02–4
newsletter.nextcloud.com: Bypass firewall protection#145730ValidAuthentication–2016-07-18–4
nextcloud.com: Directory listening for 'wp-includes' forders#145495ValidInformation Disclosure–2016-06-17–4
nextcloud.com: Mail Bombing ( No Rate Limiting On Sending Emails On Contact us Page)#145458ValidMemory Corruption–2016-07-17–4
help.nextcloud.com: Known DoS condition (null pointer deref) in Nginx running#145409ValidDenial of Service–2016-07-27–4
Enumeration of subscribed users and unauthenticated email unsubscriptions on https://newsletter.nextcloud.com/?p=unsubscribe#145396ValidInformation Disclosure–2016-06-19–4
stats.nextcloud.com: Content Injection#145375ValidMisconfiguration and Insecure Design–2016-07-17–4
Reflected Self-XSS Vulnerability in the Comment section of Files Information#164027ValidCross-site Scripting–2016-08-30$1003
demo.nextcloud.com: Content spoofing due to default Apache Error Page#155189ValidMisconfiguration and Insecure Design–2016-09-29–3
Content injection in subdomain#145853ValidMisconfiguration and Insecure Design–2016-06-19–3
Content Spoofing/Text Injection - docs.nextcloud.org#145850ValidMisconfiguration and Insecure Design–2016-06-19–3
No captcha on newsletter.nextcloudcom leaves vulnerable to email spammers#145612ValidMisconfiguration and Insecure Design–2016-06-19–3
https://newsletter.nextcloud.com Directory listening and Information Disclosure#145603ValidInformation Disclosure–2016-06-18–3
Content Spoofing#145374ValidMisconfiguration and Insecure Design–2016-06-19–3
Content Injection - apps.nextcloud.com#161299ValidMisconfiguration and Insecure Design–2016-08-26–2
Arbitrary File Upload in Logo & Log in image Theming setting.#155690ValidCross-site Scripting–2016-10-05–2
Content spoofing in cloud.nextcloud.com#152925ValidMisconfiguration and Insecure Design–2016-08-30–2
Content Injection in subdomain#145854ValidMisconfiguration and Insecure Design–2016-06-19–2
Content Injection 404 page#145849ValidMisconfiguration and Insecure Design–2016-06-19–2
Nextcloud server software: Content Spoofing#145463ValidMisconfiguration and Insecure Design–2016-07-19–2
xss on demo.nextcloud.com due to outdated version#177713ValidCross-site Scripting–2016-11-26–1
Slow Http attack on nextcloud(DOS)#163823ValidDenial of Service–2016-10-05–1
Content Injection - demo.nextcloud.com#161323ValidMisconfiguration and Insecure Design–2016-08-26–1
demo.nextcloud.com: Content spoofing due to default Apache Error Page#156425ValidMisconfiguration and Insecure Design–2016-08-30–1
[Nextcloud 9.0.53] Content Spoofing in 'trustDomain' parameter#153251ValidMisconfiguration and Insecure Design–2016-12-05–1

Status and severity are HackerOne's. “Access stated” is what the title says; “Access needed” and techniques come from CyberSIXT's analysis of the public report, where there is one, which can be wrong. Data as of 2026-11-15.