# CVE-2021-37777: Information disclosure in n/a

> Attackers can access other users' uploaded thumbnails by guessing filenames, leading to sensitive information disclosure in Gila CMS.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Oct 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-m6vx-x725-7c66

## What is CVE-2021-37777?

CVE-2021-37777 is a high-severity vulnerability in n/a, published on 4 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Gila CMS 2.2.0 is vulnerable to Insecure Direct Object Reference (IDOR). Thumbnails uploaded by one site owner are visible by another site owner just by knowing the other site name and fuzzing for picture names. This leads to sensitive information disclosure.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2021-37777?

It affects 1 product.


Products: Gilacms Gila Cms.

## How do I fix CVE-2021-37777?

No fix has been published for CVE-2021-37777 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-37777 being exploited?

There is no known exploitation of CVE-2021-37777 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-17536](https://insights.sbomify.com/CVE-2019-17536/): File upload in n/a (critical 9.9)
- [CVE-2019-17535](https://insights.sbomify.com/CVE-2019-17535/): Cross-site scripting in n/a (critical 9.3)
- [CVE-2020-5514](https://insights.sbomify.com/CVE-2020-5514/): File upload in n/a (critical 9.1)
- [CVE-2020-20726](https://insights.sbomify.com/CVE-2020-20726/): GilaCMS Cross Site Request Forgery vulnerability (high 8.8)
- [CVE-2020-20693](https://insights.sbomify.com/CVE-2020-20693/): Cross-Site Request Forgery in GilaCMS (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37777 and fix it if it is affected.

What it is: CVE-2021-37777 is a high-severity vulnerability in n/a, published on 4 Oct 2021. 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-2021-37777 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-2021-37777/ (Markdown: https://insights.sbomify.com/CVE-2021-37777/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37777
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37777
- OSV: https://osv.dev/vulnerability/CVE-2021-37777

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-37777/
Summaries are generated and may contain mistakes; the official description above is the record.