# CVE-2025-64663: Custom Question Answering Elevation of Privilege Vulnerability

> An attacker can exploit Server-Side Request Forgery in Azure Cognitive Service for Language to escalate privileges and access sensitive data.

- **Severity:** Critical 9.9 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Dec 2025
- **Updated:** 16 Apr 2026
- **Also known as:** GHSA-f5q7-q5c3-56h8

## What is CVE-2025-64663?

CVE-2025-64663 is a critical server-side request forgery vulnerability in Microsoft Azure Cognitive Service for Language, published on 18 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Custom Question Answering Elevation of Privilege Vulnerability

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2025-64663?

It affects 1 product.


Products: Microsoft Azure Language.

## How do I fix CVE-2025-64663?

No fix has been published for CVE-2025-64663 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-64663 being exploited?

There is no known exploitation of CVE-2025-64663 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-64663 and fix it if it is affected.

What it is: CVE-2025-64663 is a critical server-side request forgery vulnerability in Microsoft Azure Cognitive Service for Language, published on 18 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-64663 in the wild and no public exploit code.

Affected product: Microsoft Azure Cognitive Service for Language. 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-2025-64663/ (Markdown: https://insights.sbomify.com/CVE-2025-64663/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-64663
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-64663
- OSV: https://osv.dev/vulnerability/CVE-2025-64663

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-64663/
Summaries are generated and may contain mistakes; the official description above is the record.