# CVE-2024-12756: Avaya Spaces HTML injection (HTMLi) Vulnerability

> Attackers can inject HTML into Avaya Spaces to disclose sensitive information or modify page content viewed by users.

- **Severity:** High 7.3 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Feb 2025
- **Updated:** 1 Oct 2025
- **Also known as:** GHSA-mfvh-6rjh-8jrp

## What is CVE-2024-12756?

CVE-2024-12756 is a high-severity cross-site scripting vulnerability in Avaya Spaces, published on 11 Feb 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

An HTML Injection vulnerability in Avaya Spaces may have allowed disclosure of sensitive information or modification of the page content seen by the user.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-1287 (Improper Validation of Specified Type of Input)

## Which versions are affected by CVE-2024-12756?

It affects 1 product.


Products: Avaya Spaces.

## How do I fix CVE-2024-12756?

No fix has been published for CVE-2024-12756 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-12756 being exploited?

There is no known exploitation of CVE-2024-12756 in the wild and no public exploit code.

## Other vulnerabilities in Avaya Spaces

- [CVE-2024-12755](https://insights.sbomify.com/CVE-2024-12755/): Avaya Spaces XSS Vulnerability (high 7.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-12756 and fix it if it is affected.

What it is: CVE-2024-12756 is a high-severity cross-site scripting vulnerability in Avaya Spaces, published on 11 Feb 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-12756 in the wild and no public exploit code.

Affected product: Avaya Spaces. 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-2024-12756/ (Markdown: https://insights.sbomify.com/CVE-2024-12756/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-12756
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-12756
- OSV: https://osv.dev/vulnerability/CVE-2024-12756

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-12756/
Summaries are generated and may contain mistakes; the official description above is the record.