# CVE-2012-0911: Deserialization in n/a

> Remote attackers can execute arbitrary PHP code in TikiWiki CMS by sending crafted serialized objects in specific parameters.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Jul 2012
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-qmxq-rh22-gxp8

## What is CVE-2012-0911?

CVE-2012-0911 is a critical unsafe deserialization vulnerability in Tiki Tikiwiki Cms\/Groupware, published on 12 Jul 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

TikiWiki CMS/Groupware before 6.7 LTS and before 8.4 allows remote attackers to execute arbitrary PHP code via a crafted serialized object in the (1) cookieName to lib/banners/bannerlib.php; (2) printpages or (3) printstructures parameter to (a) tiki-print_multi_pages.php or (b) tiki-print_pages.php; or (4) sendpages, (5) sendstructures, or (6) sendarticles parameter to tiki-send_objects.php, which is not properly handled when processed by the unserialize function.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2012-0911?

It affects 1 product.


Products: Tiki Tikiwiki Cms\/Groupware.

## How do I fix CVE-2012-0911?

No fix has been published for CVE-2012-0911 yet. Limit exposure of the affected software until one is available.

## Is CVE-2012-0911 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-0911 exists.

Public exploit code:

- Tiki Wiki CMS Groupware 8.3 - 'Unserialize()' PHP Code Execution (exploitdb)
- Tiki Wiki unserialize() PHP Code Execution (metasploit)
- Tiki Wiki CMS Groupware 8.3 - 'Unserialize()' PHP Code Execution (Metasploit) (exploitdb)

## Other vulnerabilities in Tiki Tikiwiki Cms\/Groupware

- [CVE-2008-3653](https://insights.sbomify.com/CVE-2008-3653/): Multiple unspecified vulnerabilities in TikiWiki CMS/Groupware before 2.0 have unknown impact and attack vectors. (critical 10.0)
- [CVE-2007-6529](https://insights.sbomify.com/CVE-2007-6529/): Other in n/a (critical 10.0)
- [CVE-2010-4239](https://insights.sbomify.com/CVE-2010-4239/): Path traversal in CMS Groupware (critical 9.8)
- [CVE-2025-34111](https://insights.sbomify.com/CVE-2025-34111/): Tiki Wiki <= 15.1 ELFinder Unauthenticated File Upload RCE (critical 9.3)
- [CVE-2020-29254](https://insights.sbomify.com/CVE-2020-29254/): Cross-site request forgery in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-0911 and fix it if it is affected.

What it is: CVE-2012-0911 is a critical unsafe deserialization vulnerability in Tiki Tikiwiki Cms\/Groupware, published on 12 Jul 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-0911 exists.

Affected product: Tiki Tikiwiki Cms\/Groupware. 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-2012-0911/ (Markdown: https://insights.sbomify.com/CVE-2012-0911/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-0911
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-0911
- OSV: https://osv.dev/vulnerability/CVE-2012-0911

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-0911/
Summaries are generated and may contain mistakes; the official description above is the record.