# CVE-2012-1495: Code injection in n/a

> Remote attackers can execute arbitrary code in WebCalendar via the form_single_user_login parameter in the installation script.

- **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:** 27 Jan 2020
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-5whg-989c-xx4x

## What is CVE-2012-1495?

CVE-2012-1495 is a critical code injection vulnerability in n/a, published on 27 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

install/index.php in WebCalendar before 1.2.5 allows remote attackers to execute arbitrary code via the form_single_user_login parameter.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2012-1495?

It affects 1 product.


Products: Webcalendar Project Webcalendar.

## How do I fix CVE-2012-1495?

No fix has been published for CVE-2012-1495 yet. Limit exposure of the affected software until one is available.

## Is CVE-2012-1495 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-1495 exists.

Public exploit code:

- WebCalendar 1.2.4 - Remote Code Execution (exploitdb)
- WebCalendar 1.2.4 Pre-Auth Remote Code Injection (metasploit)
- WebCalendar 1.2.4 - Remote Code Injection (Metasploit) (exploitdb)
- https://github.com/axelbankole/CVE-2012-1495-Webcalendar- (github_poc): https://github.com/axelbankole/CVE-2012-1495-Webcalendar-

## Other vulnerabilities in n/a

- [CVE-2012-1496](https://insights.sbomify.com/CVE-2012-1496/): Path traversal in n/a (high 8.8)
- [CVE-2023-0289](https://insights.sbomify.com/CVE-2023-0289/): Cross-site Scripting (XSS) - Stored in craigk5n/webcalendar (high 7.6)
- [CVE-2012-5385](https://insights.sbomify.com/CVE-2012-5385/): Missing authorization in n/a (high 7.5)
- [CVE-2024-22635](https://insights.sbomify.com/CVE-2024-22635/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2017-10840](https://insights.sbomify.com/CVE-2017-10840/): Cross-site scripting in WebCalendar (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-1495 and fix it if it is affected.

What it is: CVE-2012-1495 is a critical code injection vulnerability in n/a, published on 27 Jan 2020. 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-2012-1495 exists.

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-2012-1495/ (Markdown: https://insights.sbomify.com/CVE-2012-1495/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-1495
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-1495
- OSV: https://osv.dev/vulnerability/CVE-2012-1495

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-1495/
Summaries are generated and may contain mistakes; the official description above is the record.