# CVE-2023-45757: Apache bRPC: The builtin service rpcz page has an XSS attack vulnerability

> Attackers can inject arbitrary XSS code into the builtin rpcz page of Apache bRPC if the feature is enabled, potentially compromising user sessions.

- **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:** 16 Oct 2023
- **Updated:** 13 Feb 2025
- **Also known as:** GHSA-rjj3-fg8r-3rr5

## What is CVE-2023-45757?

CVE-2023-45757 is a medium-severity cross-site scripting vulnerability in Apache bRPC, published on 16 Oct 2023. 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

Security vulnerability in Apache bRPC <=1.6.0 on all platforms allows attackers to inject XSS code to the builtin rpcz page.
An attacker that can send http request to bRPC server with rpcz enabled can inject arbitrary XSS code to the builtin rpcz page.

Solution (choose one of three):
1. upgrade to bRPC > 1.6.0, download link:  https://dist.apache.org/repos/dist/release/brpc/1.6.1/ 
2. If you are using an old version of bRPC and hard to upgrade, you can apply this patch:  https://github.com/apache/brpc/pull/2411 
3. disable rpcz feature

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

## Which versions are affected by CVE-2023-45757?

It affects 1 product.


Products: Apache Brpc.

## How do I fix CVE-2023-45757?

No fix has been published for CVE-2023-45757 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-45757 being exploited?

There is no known exploitation of CVE-2023-45757 in the wild and no public exploit code.

## Other vulnerabilities in Apache bRPC

- [CVE-2025-60021](https://insights.sbomify.com/CVE-2025-60021/): Apache bRPC: Remote command injection vulnerability in heap builtin service (critical 9.8)
- [CVE-2023-31039](https://insights.sbomify.com/CVE-2023-31039/): Apache bRPC: ServerOptions.pid_file may cause arbitrary code execution (critical 9.8)
- [CVE-2025-59789](https://insights.sbomify.com/CVE-2025-59789/): Apache bRPC: Stack Exhaustion via Unbounded Recursion in JSON Parser (high 7.5)
- [CVE-2025-54472](https://insights.sbomify.com/CVE-2025-54472/): Apache bRPC: Redis Parser Remote Denial of Service (high 7.5)
- [CVE-2024-23452](https://insights.sbomify.com/CVE-2024-23452/): Apache bRPC: HTTP request smuggling vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-45757 and fix it if it is affected.

What it is: CVE-2023-45757 is a medium-severity cross-site scripting vulnerability in Apache bRPC, published on 16 Oct 2023. 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-2023-45757 in the wild and no public exploit code.

Affected product: Apache bRPC. 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-2023-45757/ (Markdown: https://insights.sbomify.com/CVE-2023-45757/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-45757
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-45757
- OSV: https://osv.dev/vulnerability/CVE-2023-45757

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-45757/
Summaries are generated and may contain mistakes; the official description above is the record.