# CVE-2016-10026: Missing authorization in n/a

> Remote attackers can revert page changes by exploiting improper permission checks in ikiwiki when specific plugins and CGI are enabled.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Feb 2017
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-10026, GHSA-r7m6-q359-fprm, UBUNTU-CVE-2016-10026

## What is CVE-2016-10026?

CVE-2016-10026 is a high-severity missing authorization vulnerability in n/a, published on 13 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ikiwiki 3.20161219 does not properly check if a revision changes the access permissions for a page on sites with the git and recentchanges plugins and the CGI interface enabled, which allows remote attackers to revert certain changes by leveraging permissions to change the page before the revision was made.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2016-10026?

It affects 1 product.


Products: Ikiwiki Ikiwiki.

## How do I fix CVE-2016-10026?

Upgrade to a fixed version.

## Is CVE-2016-10026 being exploited?

There is no known exploitation of CVE-2016-10026 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-9187](https://insights.sbomify.com/CVE-2019-9187/): Server-side request forgery in n/a (high 7.5)
- [CVE-2008-0169](https://insights.sbomify.com/CVE-2008-0169/): Auth bypass in n/a (medium 6.8)
- [CVE-2016-9645](https://insights.sbomify.com/CVE-2016-9645/): Editing restriction bypass for git revert (medium 6.5)
- [CVE-2010-1673](https://insights.sbomify.com/CVE-2010-1673/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2011-0428](https://insights.sbomify.com/CVE-2011-0428/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-10026 and fix it if it is affected.

What it is: CVE-2016-10026 is a high-severity missing authorization vulnerability in n/a, published on 13 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-10026 in the wild and no public exploit code.

Affected product: n/a. 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-2016-10026/ (Markdown: https://insights.sbomify.com/CVE-2016-10026/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-10026
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-10026
- OSV: https://osv.dev/vulnerability/CVE-2016-10026

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-10026/
Summaries are generated and may contain mistakes; the official description above is the record.