# CVE-2021-21319: Several stored XSS

> Attackers can inject malicious JavaScript into Galette's self-subscription, login, and password retrieval pages, potentially compromising user sessions.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 25 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-vjc9-mj44-x59q, UBUNTU-CVE-2021-21319

## What is CVE-2021-21319?

CVE-2021-21319 is a medium-severity cross-site scripting vulnerability in galette, published on 25 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Galette is a membership management web application geared towards non profit organizations. In versions prior to 0.9.5, malicious javascript code can be stored to be displayed later on self subscription page. The self subscription feature can be disabled as a workaround (this is the default state). Malicious javascript code can be executed (not stored) on login and retrieve password pages. This issue is patched in version 0.9.5.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-21319?

It affects 1 product.


Products: Galette Galette.

## How do I fix CVE-2021-21319?

No fix has been published for CVE-2021-21319 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-21319 being exploited?

There is no known exploitation of CVE-2021-21319 in the wild and no public exploit code.

## Other vulnerabilities in galette

- [CVE-2021-41262](https://insights.sbomify.com/CVE-2021-41262/): SQL Injection in Galette (high 8.8)
- [CVE-2021-41260](https://insights.sbomify.com/CVE-2021-41260/): Missing CSRF checks in Galette (high 8.2)
- [CVE-2021-41261](https://insights.sbomify.com/CVE-2021-41261/): Stored Cross-site Scripting in Galette (high 8.1)
- [CVE-2024-24761](https://insights.sbomify.com/CVE-2024-24761/): Galette public pages accessibility restriction (high 7.5)
- [CVE-2025-48076](https://insights.sbomify.com/CVE-2025-48076/): Galette is vulnerable to Cross-site Scripting (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-21319 and fix it if it is affected.

What it is: CVE-2021-21319 is a medium-severity cross-site scripting vulnerability in galette, published on 25 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-21319 in the wild and no public exploit code.

Affected product: galette. 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-2021-21319/ (Markdown: https://insights.sbomify.com/CVE-2021-21319/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-21319
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-21319
- OSV: https://osv.dev/vulnerability/CVE-2021-21319

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-21319/
Summaries are generated and may contain mistakes; the official description above is the record.