# CVE-2021-47920: WebMO Job Manager 20.0 Cross-Site Scripting via Search Parameters

> Remote attackers can inject malicious scripts via search parameters in WebMO Job Manager, enabling session hijacking and redirects.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA: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:** 1 Feb 2026
- **Updated:** 2 Feb 2026
- **Also known as:** GHSA-gx87-2fm2-mvvj

## What is CVE-2021-47920?

CVE-2021-47920 is a medium-severity cross-site scripting vulnerability in WebMO, LLC WebMO Job Manager, published on 1 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

WebMO Job Manager 20.0 contains a cross-site scripting vulnerability in search parameters that allows remote attackers to inject malicious script code. Attackers can exploit the filterSearch and filterSearchType parameters to perform non-persistent attacks including session hijacking and external redirects.

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

## Which versions are affected by CVE-2021-47920?


## How do I fix CVE-2021-47920?

No fix has been published for CVE-2021-47920 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47920 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47920 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47920 and fix it if it is affected.

What it is: CVE-2021-47920 is a medium-severity cross-site scripting vulnerability in WebMO, LLC WebMO Job Manager, published on 1 Feb 2026. Any signed-in user can exploit it over the network, 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-2021-47920 exists.

Affected product: WebMO, LLC WebMO Job Manager. 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-2021-47920/ (Markdown: https://insights.sbomify.com/CVE-2021-47920/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47920
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47920
- OSV: https://osv.dev/vulnerability/CVE-2021-47920

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-47920/
Summaries are generated and may contain mistakes; the official description above is the record.