# CVE-2022-21826: Cross-site scripting in Pulse Connect Secure VPN Server

> Attacker can exploit HTTP request smuggling to inject malicious scripts, leading to XSS and potential account takeover in Pulse Secure VPN.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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:** 30 Sep 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-w594-hmpv-qhh5

## What is CVE-2022-21826?

CVE-2022-21826 is a medium-severity cross-site scripting vulnerability in Ivanti Connect Secure, published on 30 Sep 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Pulse Secure version 9.115 and below may be susceptible to client-side http request smuggling, When the application receives a POST request, it ignores the request's Content-Length header and leaves the POST body on the TCP/TLS socket. This body ends up prefixing the next HTTP request sent down that connection, this means when someone loads website attacker may be able to make browser issue a POST to the application, enabling XSS.

Weakness: CWE-444 (Inconsistent Interpretation of HTTP Requests)

## Which versions are affected by CVE-2022-21826?

It affects 2 products.


Products: Ivanti Connect Secure, Pulsesecure Pulse Connect Secure.

## How do I fix CVE-2022-21826?

No fix has been published for CVE-2022-21826 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-21826 being exploited?

There is no known exploitation of CVE-2022-21826 in the wild and no public exploit code.

## Other vulnerabilities in Ivanti Connect Secure

- [CVE-2021-22893](https://insights.sbomify.com/CVE-2021-22893/): Ivanti Pulse Connect Secure Use-After-Free (critical 10.0, exploited in the wild)
- [CVE-2019-11510](https://insights.sbomify.com/CVE-2019-11510/): Ivanti Pulse Connect Secure Arbitrary File Read (critical 9.9, exploited in the wild)
- [CVE-2024-21887](https://insights.sbomify.com/CVE-2024-21887/): Ivanti Connect Secure and Policy Secure Command Injection (critical 9.1, exploited in the wild)
- [CVE-2025-22457](https://insights.sbomify.com/CVE-2025-22457/): Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow (critical 9.0, exploited in the wild)
- [CVE-2025-0282](https://insights.sbomify.com/CVE-2025-0282/): Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow (critical 9.0, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-21826 and fix it if it is affected.

What it is: CVE-2022-21826 is a medium-severity cross-site scripting vulnerability in Ivanti Connect Secure, published on 30 Sep 2022. 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-2022-21826 in the wild and no public exploit code.

Affected product: Ivanti Connect Secure. 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-2022-21826/ (Markdown: https://insights.sbomify.com/CVE-2022-21826/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-21826
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-21826
- OSV: https://osv.dev/vulnerability/CVE-2022-21826

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-21826/
Summaries are generated and may contain mistakes; the official description above is the record.