# CVE-2021-4273: studygolang search.go Search cross site scripting

> Remote attackers can execute arbitrary scripts via the search query parameter in studygolang, potentially leading to session hijacking or data theft.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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:** 21 Dec 2022
- **Updated:** 14 Apr 2025
- **Also known as:** GHSA-h3rc-wrmf-3v4p

## What is CVE-2021-4273?

CVE-2021-4273 is a medium-severity cross-site scripting vulnerability in unspecified studygolang, published on 21 Dec 2022. 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

A vulnerability classified as problematic was found in studygolang. This vulnerability affects the function Search of the file http/controller/search.go. The manipulation of the argument q leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 97ba556d42fa89dfaa7737e9cd3a8ddaf670bb23. It is recommended to apply a patch to fix this issue. VDB-216478 is the identifier assigned to this vulnerability.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-707 (Improper Neutralization)

## Which versions are affected by CVE-2021-4273?

It affects 1 product.


Products: Studygolang Studygolang.

## How do I fix CVE-2021-4273?

No fix has been published for CVE-2021-4273 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-4273 being exploited?

There is no known exploitation of CVE-2021-4273 in the wild and no public exploit code.

## Other vulnerabilities in unspecified studygolang

- [CVE-2021-4272](https://insights.sbomify.com/CVE-2021-4272/): studygolang topics.js cross site scripting (low 3.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-4273 and fix it if it is affected.

What it is: CVE-2021-4273 is a medium-severity cross-site scripting vulnerability in unspecified studygolang, published on 21 Dec 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-4273 in the wild and no public exploit code.

Affected product: unspecified studygolang. 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-2021-4273/ (Markdown: https://insights.sbomify.com/CVE-2021-4273/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-4273
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-4273
- OSV: https://osv.dev/vulnerability/CVE-2021-4273

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-4273/
Summaries are generated and may contain mistakes; the official description above is the record.