# CVE-2025-53827: ownCloud Core: Updater has an exposed dangerous method or function

> Administrators can execute arbitrary code via exposed dangerous methods in the ownCloud Core Updater component.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jul 2026
- **Updated:** 8 Jul 2026

## What is CVE-2025-53827?

CVE-2025-53827 is a critical code injection vulnerability in ownCloud Core, published on 6 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

ownCloud Core is the server-side component of the file storage, synchronization, and sharing application ownCloud Classic. In versions prior to 10.15.3, the Updater on ownCloud 10 before 10.15.3 has an exposed dangerous method or function. Attackers with administrative privileges may leverage functionality to execute arbitrary code. This issue has been fixed in version 10.15.3.

Weakness: CWE-749 (Exposed Dangerous Method or Function)

## Which versions are affected by CVE-2025-53827?


## How do I fix CVE-2025-53827?

No fix has been published for CVE-2025-53827 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-53827 being exploited?

There is no known exploitation of CVE-2025-53827 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-53827 and fix it if it is affected.

What it is: CVE-2025-53827 is a critical code injection vulnerability in ownCloud Core, published on 6 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-53827 in the wild and no public exploit code.

Affected product: ownCloud Core. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-53827/ (Markdown: https://insights.sbomify.com/CVE-2025-53827/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-53827
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-53827
- OSV: https://osv.dev/vulnerability/CVE-2025-53827

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-53827/
Summaries are generated and may contain mistakes; the official description above is the record.