# CVE-2020-35740: HGiga MailSherlock - XSS -1

> Attackers can inject JavaScript via URL parameters in HGiga MailSherlock, potentially leading to session hijacking or malicious actions.

- **Severity:** High 7.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 31 Dec 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-r2gc-8vh7-8256

## What is CVE-2020-35740?

CVE-2020-35740 is a high-severity cross-site scripting vulnerability in HGiga MailSherlock MSR45/SSR45, published on 31 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

HGiga MailSherlock does not validate specific URL parameters properly that allows attackers to inject JavaScript syntax for XSS attacks.

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

## Which versions are affected by CVE-2020-35740?

It affects 4 products.


Products: Hgiga Msr45 Isherlock-Antispam, Hgiga Msr45 Isherlock-User, Hgiga Ssr45 Isherlock-Antispam, Hgiga Ssr45 Isherlock-User.

## How do I fix CVE-2020-35740?

No fix has been published for CVE-2020-35740 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-35740 being exploited?

There is no known exploitation of CVE-2020-35740 in the wild and no public exploit code.

## Other vulnerabilities in HGiga MailSherlock MSR45/SSR45

- [CVE-2020-25848](https://insights.sbomify.com/CVE-2020-25848/): HGiga MailSherlock - Broken Authentication (critical 9.8)
- [CVE-2021-22848](https://insights.sbomify.com/CVE-2021-22848/): HGiga MailSherlock - SQL Injection-2 (high 7.0)
- [CVE-2020-35741](https://insights.sbomify.com/CVE-2020-35741/): HGiga MailSherlock - XSS -2 (high 7.0)
- [CVE-2020-35742](https://insights.sbomify.com/CVE-2020-35742/): HGiga MailSherlock - SQL Injection -1 (high 7.0)
- [CVE-2020-35743](https://insights.sbomify.com/CVE-2020-35743/): HGiga MailSherlock - SQL Injection -3 (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-35740 and fix it if it is affected.

What it is: CVE-2020-35740 is a high-severity cross-site scripting vulnerability in HGiga MailSherlock MSR45/SSR45, published on 31 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-35740 in the wild and no public exploit code.

Affected product: HGiga MailSherlock MSR45/SSR45. 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-2020-35740/ (Markdown: https://insights.sbomify.com/CVE-2020-35740/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-35740
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-35740
- OSV: https://osv.dev/vulnerability/CVE-2020-35740

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-35740/
Summaries are generated and may contain mistakes; the official description above is the record.