# CVE-2026-30238: Group-Office: Reflected XSS in JavaScript context

> Attackers can execute arbitrary JavaScript in victims' browsers via reflected XSS in Group-Office, potentially leading to session hijacking or data theft.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA: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:** 6 Mar 2026
- **Updated:** 9 Mar 2026
- **Also known as:** GHSA-7p2f-c33m-rv5v

## What is CVE-2026-30238?

CVE-2026-30238 is a medium-severity cross-site scripting vulnerability in Intermesh groupoffice, published on 6 Mar 2026. 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

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.155, 25.0.88, and 26.0.10, there is a reflected XSS vulnerability in GroupOffice on the external/index flow. The f parameter (Base64 JSON) is decoded and then injected into an inline JavaScript block without strict escaping, allowing </script><script>...</script> injection and arbitrary JavaScript execution in the victim's browser. This issue has been patched in versions 6.8.155, 25.0.88, and 26.0.10.

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

## Which versions are affected by CVE-2026-30238?

It affects 1 product.


Products: Intermesh Group-Office.

## How do I fix CVE-2026-30238?

No fix has been published for CVE-2026-30238 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-30238 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30238 exists.

## Other vulnerabilities in Intermesh groupoffice

- [CVE-2026-34838](https://insights.sbomify.com/CVE-2026-34838/): Group-Office: Authenticated Remote Code Execution via PHP Insecure Deserialization in `AbstractSettingsCollection` (critical 10.0)
- [CVE-2026-27947](https://insights.sbomify.com/CVE-2026-27947/): Group-Office Vulnerable to Remote Code Execution (RCE) (critical 9.4)
- [CVE-2026-33755](https://insights.sbomify.com/CVE-2026-33755/): Authenticated SQL Injection in Contact/query addressBookIds filter (high 8.8)
- [CVE-2010-3428](https://insights.sbomify.com/CVE-2010-3428/): SQL injection in n/a (high 7.5)
- [CVE-2026-27832](https://insights.sbomify.com/CVE-2026-27832/): Group-Office Has Authenticated SQL Injection in advancedQueryData.comparator (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-30238 and fix it if it is affected.

What it is: CVE-2026-30238 is a medium-severity cross-site scripting vulnerability in Intermesh groupoffice, published on 6 Mar 2026. 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-2026-30238 exists.

Affected product: Intermesh groupoffice. 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-2026-30238/ (Markdown: https://insights.sbomify.com/CVE-2026-30238/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-30238
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-30238
- OSV: https://osv.dev/vulnerability/CVE-2026-30238

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-30238/
Summaries are generated and may contain mistakes; the official description above is the record.