# CVE-2021-26702: Cross-site scripting in n/a

> Attackers can execute arbitrary scripts in victims' browsers via a reflected XSS vulnerability in the dataset parameter of EPrints.

- **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:** 1 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-2xgx-2v3w-62r6

## What is CVE-2021-26702?

CVE-2021-26702 is a medium-severity cross-site scripting vulnerability in n/a, published on 1 Mar 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

EPrints 3.4.2 exposes a reflected XSS opportunity in the dataset parameter to the cgi/dataset_dictionary URI.

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

## Which versions are affected by CVE-2021-26702?

It affects 1 product.


Products: Eprints Eprints.

## How do I fix CVE-2021-26702?

No fix has been published for CVE-2021-26702 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26702 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-26702 exists.

Public exploit code:

- EPrints 3.4.2 - Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-26702.yaml

## Other vulnerabilities in n/a

- [CVE-2021-26476](https://insights.sbomify.com/CVE-2021-26476/): Command injection in n/a (critical 9.8)
- [CVE-2021-26703](https://insights.sbomify.com/CVE-2021-26703/): XML external entity in n/a (critical 9.8)
- [CVE-2021-3342](https://insights.sbomify.com/CVE-2021-3342/): Command injection in n/a (critical 9.8)
- [CVE-2021-26704](https://insights.sbomify.com/CVE-2021-26704/): Command injection in n/a (high 8.8)
- [CVE-2021-26475](https://insights.sbomify.com/CVE-2021-26475/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26702 and fix it if it is affected.

What it is: CVE-2021-26702 is a medium-severity cross-site scripting vulnerability in n/a, published on 1 Mar 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-2021-26702 exists.

Affected product: n/a. 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-2021-26702/ (Markdown: https://insights.sbomify.com/CVE-2021-26702/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26702
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26702
- OSV: https://osv.dev/vulnerability/CVE-2021-26702

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26702/
Summaries are generated and may contain mistakes; the official description above is the record.