# CVE-2021-29436: Cross site request forgery vulnerability

> Anuko Time Tracker allows CSRF attacks enabling attackers to trick logged-in users into changing passwords or performing unintended actions.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 Apr 2021
- **Updated:** 3 Aug 2024

## What is CVE-2021-29436?

CVE-2021-29436 is a medium-severity vulnerability in anuko timetracker, published on 13 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Anuko Time Tracker is an open source, web-based time tracking application written in PHP. In Time Tracker before version 1.19.27.5431 a Cross site request forgery (CSRF) vulnerability existed. The nature of CSRF is that a logged on user may be tricked by social engineering to click on an attacker-provided form that executes an unintended action such as changing user password. The vulnerability is fixed in Time Tracker version 1.19.27.5431. Upgrade is recommended. If upgrade is not practical, introduce ttMitigateCSRF() function in /WEB-INF/lib/common.php.lib using the latest available code and call it from ttAccessAllowed().

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2021-29436?

It affects 1 product.


Products: Anuko Time Tracker.

## How do I fix CVE-2021-29436?

No fix has been published for CVE-2021-29436 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-29436 being exploited?

There is no known exploitation of CVE-2021-29436 in the wild and no public exploit code.

## Other vulnerabilities in anuko timetracker

- [CVE-2020-27422](https://insights.sbomify.com/CVE-2020-27422/): Business logic in n/a (critical 9.8)
- [CVE-2023-32306](https://insights.sbomify.com/CVE-2023-32306/): Time Tracker has Blind SQL Injection Vulnerability in Reports (high 8.8)
- [CVE-2020-15255](https://insights.sbomify.com/CVE-2020-15255/): CSV injection in Anuko Time Tracker (high 8.7)
- [CVE-2023-32308](https://insights.sbomify.com/CVE-2023-32308/): SQL Injection Vulnerability in anuko timetracker (high 8.2)
- [CVE-2021-43851](https://insights.sbomify.com/CVE-2021-43851/): SQL injection vulnerability in anuko timetracker (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-29436 and fix it if it is affected.

What it is: CVE-2021-29436 is a medium-severity vulnerability in anuko timetracker, published on 13 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-29436 in the wild and no public exploit code.

Affected product: anuko timetracker. 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-2021-29436/ (Markdown: https://insights.sbomify.com/CVE-2021-29436/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-29436
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-29436
- OSV: https://osv.dev/vulnerability/CVE-2021-29436

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-29436/
Summaries are generated and may contain mistakes; the official description above is the record.