Security readout for executives and security teams
Plain-English summary
This flaw allowed a crafted DAV error message in older Nextcloud and ownCloud servers to misrepresent information shown to a user. It is not described as code execution or data theft, but it could support phishing-style deception on affected systems.
Executive priority
Treat as a low-priority legacy hygiene item unless affected versions are internet-facing or used for sensitive collaboration. The main business risk is deception and user trust erosion, not confirmed system takeover.
Technical view
The DAV app exposed exception messages on DAV endpoints that included partially user-controllable input. This created a content spoofing condition tracked as CWE-451. Affected versions are Nextcloud Server before 9.0.54 and 10.0.1, and ownCloud Server before 9.0.6 and 9.1.2.
Likely exposure
Exposure is limited to organizations still running the listed legacy Nextcloud or ownCloud versions with DAV endpoints reachable by users or the network. Current deployments are unlikely to be exposed if maintained on supported releases.
Exploitation context
The provided sources do not show active exploitation, KEV listing, or public weaponization. The issue requires user-facing interpretation of a misleading DAV exception message rather than direct compromise described in the record.
Researcher notes
Evidence is consistent across the CVE description, advisories, commits, and HackerOne reference, but the source bundle does not include CVSS details. Avoid assuming broader impact beyond content spoofing in DAV exception handling.
Mitigation direction
- Upgrade Nextcloud Server to 9.0.54, 10.0.1, or later.
- Upgrade ownCloud Server to 9.0.6, 9.1.2, or later.
- Review the Nextcloud and ownCloud advisories for version-specific guidance.
- Retire unsupported legacy deployments where upgrade paths are no longer maintained.
Validation and detection
- Inventory all Nextcloud and ownCloud server versions in use.
- Confirm no affected versions remain exposed internally or externally.
- Check whether DAV endpoints are enabled and reachable.
- Review web server logs for unusual DAV endpoint error activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-451: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2016-9468 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://owncloud.org/security/advisory/?id=oc-sa-2016-021CVE reference · x_refsource_MISC
- https://github.com/nextcloud/server/commit/a4cfb3ddc1f4cdb585e05c0e9b2f8e52a0e2ee3eCVE reference · x_refsource_MISC
- https://github.com/nextcloud/server/commit/7350e13113c8ed484727a5c25331ec11d4d59f5fCVE reference · x_refsource_MISC
- https://github.com/owncloud/core/commit/96b8afe48570bc70088ccd8f897e9d71997d336eCVE reference · x_refsource_MISC
- https://hackerone.com/reports/149798CVE reference · x_refsource_MISC
- https://github.com/owncloud/core/commit/bcc6c39ad8c22a00323a114e9c1a0a834983fb35CVE reference · x_refsource_MISC
- https://nextcloud.com/security/advisory/?id=nc-sa-2016-011CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
User Interface (UI) Misrepresentation of Critical Information
User Interface (UI) Misrepresentation of Critical Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.