# CVE-2020-35677: Cross-site scripting in n/a

> Stored XSS in BigProf Online Invoicing System allows attackers to inject scripts via group creation, exploiting missing CSRF protection to bypass admin-only restrictions.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 24 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-g3q9-p77m-rp7m

## What is CVE-2020-35677?

CVE-2020-35677 is a medium-severity cross-site scripting vulnerability in n/a, published on 24 Dec 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

BigProf Online Invoicing System before 4.0 fails to adequately sanitize fields for HTML characters upon an administrator using admin/pageEditGroup.php to create a new group, resulting in Stored XSS. The caveat here is that an attacker would need administrative privileges in order to create the payload. One might think this completely mitigates the privilege-escalation impact as there is only one high-privileged role. However, it was discovered that the endpoint responsible for creating the group lacks CSRF protection.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2020-35677?

It affects 1 product.


Products: Bigprof Online Invoicing System.

## How do I fix CVE-2020-35677?

No fix has been published for CVE-2020-35677 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-35677 being exploited?

There is no known exploitation of CVE-2020-35677 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-35674](https://insights.sbomify.com/CVE-2020-35674/): SQL injection in n/a (critical 9.8)
- [CVE-2020-35675](https://insights.sbomify.com/CVE-2020-35675/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2021-21260](https://insights.sbomify.com/CVE-2021-21260/): XSS in description field (high 7.6)
- [CVE-2023-6426](https://insights.sbomify.com/CVE-2023-6426/): Cross-site Scripting vulnerability in BigProf products (medium 6.3)
- [CVE-2023-6427](https://insights.sbomify.com/CVE-2023-6427/): Cross-site Scripting vulnerability in BigProf products (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-35677 and fix it if it is affected.

What it is: CVE-2020-35677 is a medium-severity cross-site scripting vulnerability in n/a, published on 24 Dec 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-35677 in the wild and no public exploit code.

Affected product: n/a. 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-2020-35677/ (Markdown: https://insights.sbomify.com/CVE-2020-35677/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-35677
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-35677
- OSV: https://osv.dev/vulnerability/CVE-2020-35677

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-35677/
Summaries are generated and may contain mistakes; the official description above is the record.