# CVE-2021-24214: OpenID Connect Generic Client 3.8.0-3.8.1 - Reflected Cross Site Scripting (XSS) via Login Error

> Unauthenticated attackers can execute arbitrary scripts in victim browsers via reflected XSS in the OpenID Connect Generic Client login error message.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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:** 5 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-6gp2-g559-39jj

## What is CVE-2021-24214?

CVE-2021-24214 is a medium-severity cross-site scripting vulnerability in daggerhart OpenID Connect Generic Client, published on 5 May 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

The OpenID Connect Generic Client WordPress plugin 3.8.0 and 3.8.1 did not sanitise the login error when output back in the login form, leading to a reflected Cross-Site Scripting issue. This issue does not require authentication and can be exploited with the default configuration.

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

## Which versions are affected by CVE-2021-24214?

It affects 1 product.


Products: Daggerhartlab Openid Connect Generic Client.

## How do I fix CVE-2021-24214?

No fix has been published for CVE-2021-24214 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24214 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24214 exists.

Public exploit code:

- WordPress OpenID Connect Generic Client 3.8.0-3.8.1 - Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-24214.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24214 and fix it if it is affected.

What it is: CVE-2021-24214 is a medium-severity cross-site scripting vulnerability in daggerhart OpenID Connect Generic Client, published on 5 May 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24214 exists.

Affected product: daggerhart OpenID Connect Generic Client. 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-2021-24214/ (Markdown: https://insights.sbomify.com/CVE-2021-24214/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24214
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24214
- OSV: https://osv.dev/vulnerability/CVE-2021-24214

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24214/
Summaries are generated and may contain mistakes; the official description above is the record.