# CVE-2023-26840: Cross-site request forgery in n/a

> Attackers can exploit CSRF to assign administrative privileges to arbitrary users in ChurchCRM, leading to full system compromise.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 25 Apr 2023
- **Updated:** 3 Feb 2025
- **Also known as:** GHSA-8f45-7v32-jw8m

## What is CVE-2023-26840?

CVE-2023-26840 is a medium-severity vulnerability in Churchcrm Churchcrm, published on 25 Apr 2023. 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

A cross-site request forgery (CSRF) vulnerability in ChurchCRM v4.5.3 allows attackers to set a person to a user and set that user to be an Administrator.

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

## Which versions are affected by CVE-2023-26840?

It affects 1 product.


Products: Churchcrm Churchcrm.

## How do I fix CVE-2023-26840?

No fix has been published for CVE-2023-26840 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-26840 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-26840 exists.

## Other vulnerabilities in Churchcrm Churchcrm

- [CVE-2026-39337](https://insights.sbomify.com/CVE-2026-39337/): ChurchCRM Affected by Unauthenticated RCE in Install Wizard (critical 10.0)
- [CVE-2025-62521](https://insights.sbomify.com/CVE-2025-62521/): ChurchCRM has unauthenticated RCE in its Install Wizard (critical 10.0)
- [CVE-2025-68110](https://insights.sbomify.com/CVE-2025-68110/): ChurchCRM discloses database information on error message (critical 10.0)
- [CVE-2024-53438](https://insights.sbomify.com/CVE-2024-53438/): SQL injection in n/a (critical 9.8)
- [CVE-2024-25894](https://insights.sbomify.com/CVE-2024-25894/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-26840 and fix it if it is affected.

What it is: CVE-2023-26840 is a medium-severity vulnerability in Churchcrm Churchcrm, published on 25 Apr 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-26840 exists.

Affected product: Churchcrm Churchcrm. 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-2023-26840/ (Markdown: https://insights.sbomify.com/CVE-2023-26840/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-26840
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-26840
- OSV: https://osv.dev/vulnerability/CVE-2023-26840

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-26840/
Summaries are generated and may contain mistakes; the official description above is the record.