# CVE-2021-23271: TIBCO EBX Cross Site Scripting (XSS)

> A low-privileged attacker can execute stored cross-site scripting attacks on TIBCO EBX, potentially compromising user sessions and data.

- **Severity:** High 8.0 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H`)
- **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:** 2 Feb 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-cxjj-qqpm-cpcq

## What is CVE-2021-23271?

CVE-2021-23271 is a high-severity cross-site scripting vulnerability in TIBCO EBX, published on 2 Feb 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The TIBCO EBX Web Server component of TIBCO Software Inc.'s TIBCO EBX contains a vulnerability that theoretically allows a low privileged attacker with network access to execute a Stored Cross Site Scripting (XSS) attack on the affected system. Affected releases are TIBCO Software Inc.'s TIBCO EBX: versions 5.9.12 and below.

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

## Which versions are affected by CVE-2021-23271?

It affects 1 product.


Products: Tibco Ebx.

## How do I fix CVE-2021-23271?

No fix has been published for CVE-2021-23271 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-23271 being exploited?

There is no known exploitation of CVE-2021-23271 in the wild and no public exploit code.

## Other vulnerabilities in TIBCO EBX

- [CVE-2021-35498](https://insights.sbomify.com/CVE-2021-35498/): TIBCO EBX Insecure Login Mechanism (critical 9.8)
- [CVE-2019-17330](https://insights.sbomify.com/CVE-2019-17330/): TIBCO EBX Exposes Multiple Cross-Site Scripting Vulnerabilities (high 8.8)
- [CVE-2023-26222](https://insights.sbomify.com/CVE-2023-26222/): TIBCO EBX Cross-site Scripting (XXS) Vulnerability (high 8.7)
- [CVE-2022-41565](https://insights.sbomify.com/CVE-2022-41565/): TIBCO EBX Cross Site Scripting (XSS) Vulnerability (high 8.7)
- [CVE-2022-30577](https://insights.sbomify.com/CVE-2022-30577/): TIBCO EBX Stored XSS vulnerability (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-23271 and fix it if it is affected.

What it is: CVE-2021-23271 is a high-severity cross-site scripting vulnerability in TIBCO EBX, published on 2 Feb 2021. 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-2021-23271 in the wild and no public exploit code.

Affected product: TIBCO EBX. 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-2021-23271/ (Markdown: https://insights.sbomify.com/CVE-2021-23271/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-23271
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-23271
- OSV: https://osv.dev/vulnerability/CVE-2021-23271

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-23271/
Summaries are generated and may contain mistakes; the official description above is the record.