# CVE-2023-23956: Cross-site scripting in Symantec SiteMinder WebAgent

> Attackers can inject malicious scripts into the Symantec SiteMinder WebAgent, allowing execution in victim browsers and potential session hijacking.

- **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:** 30 May 2023
- **Updated:** 14 Jan 2025
- **Also known as:** GHSA-gppq-ggm3-q93m

## What is CVE-2023-23956?

CVE-2023-23956 is a medium-severity cross-site scripting vulnerability in Symantec SiteMinder WebAgent, published on 30 May 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

A user can supply malicious HTML and JavaScript code that will be executed in the client browser

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

## Which versions are affected by CVE-2023-23956?

It affects 1 product.


Products: Broadcom Symantec Siteminder Webagent.

## How do I fix CVE-2023-23956?

No fix has been published for CVE-2023-23956 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-23956 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-23956 exists.

Public exploit code:

- Symantec SiteMinder WebAgent v12.52 - Cross-site scripting (XSS) (exploitdb)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-23956 and fix it if it is affected.

What it is: CVE-2023-23956 is a medium-severity cross-site scripting vulnerability in Symantec SiteMinder WebAgent, published on 30 May 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-23956 exists.

Affected product: Symantec SiteMinder WebAgent. 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-2023-23956/ (Markdown: https://insights.sbomify.com/CVE-2023-23956/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-23956
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-23956
- OSV: https://osv.dev/vulnerability/CVE-2023-23956

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-23956/
Summaries are generated and may contain mistakes; the official description above is the record.