# CVE-2023-5035: Cookie Without Secure Flag

> Attackers can intercept session cookies transmitted over HTTP due to missing Secure flags, potentially leading to session hijacking on Moxa PT-G503 devices.

- **Severity:** Low 3.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/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:** 2 Nov 2023
- **Updated:** 5 Sep 2024
- **Also known as:** GHSA-7v85-4vq6-66gq

## What is CVE-2023-5035?

CVE-2023-5035 is a low-severity vulnerability in Moxa PT-G503 Series, published on 2 Nov 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 vulnerability has been identified in PT-G503 Series firmware versions prior to v5.2, where the Secure attribute for sensitive cookies in HTTPS sessions is not set, which could cause the cookie to be transmitted in plaintext over an HTTP session. The vulnerability may lead to security risks, potentially exposing user session data to unauthorized access and manipulation.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information), CWE-614 (Sensitive Cookie in HTTPS Session Without 'Secure' Attribute)

## Which versions are affected by CVE-2023-5035?

It affects 1 product.


Products: Moxa Eds-G503 Firmware.

## How do I fix CVE-2023-5035?

No fix has been published for CVE-2023-5035 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-5035 being exploited?

There is no known exploitation of CVE-2023-5035 in the wild and no public exploit code.

## Other vulnerabilities in Moxa PT-G503 Series

- [CVE-2023-4217](https://insights.sbomify.com/CVE-2023-4217/): Session cookies attribute not set properly (low 3.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-5035 and fix it if it is affected.

What it is: CVE-2023-5035 is a low-severity vulnerability in Moxa PT-G503 Series, published on 2 Nov 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-2023-5035 in the wild and no public exploit code.

Affected product: Moxa PT-G503 Series. 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-2023-5035/ (Markdown: https://insights.sbomify.com/CVE-2023-5035/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-5035
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-5035
- OSV: https://osv.dev/vulnerability/CVE-2023-5035

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-5035/
Summaries are generated and may contain mistakes; the official description above is the record.