# CVE-2020-7932: OMERO-web Sensitive Data Exposure

> Attackers can steal session keys and object IDs via Referer header leakage when users click malicious links in OMERO.web.

- **Severity:** Medium 5.7 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 17 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-vwxv-frj6-fhc9, PYSEC-2020-244

## What is CVE-2020-7932?

CVE-2020-7932 is a medium-severity vulnerability in n/a, published on 17 Jun 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

OMERO.web before 5.6.3 optionally allows sensitive data elements (e.g., a session key) to be passed as URL query parameters. If an attacker tricks a user into clicking a malicious link in OMERO.web, the information in the query parameters may be exposed in the Referer header seen by the target. Information in the URL path such as object IDs may also be exposed.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2020-7932?

3 open source packages ship an affected version, including omero-web. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `omero-web` | PyPI | All versions | 5.6.3 |
| `omero-web` | PyPI | All versions | 5.6.3 |
| `omero-web` | PyPI | All versions | 5.6.3 |

Products: Openmicroscopy Omero.web.

## How do I fix CVE-2020-7932?

Upgrade omero-web to 5.6.3 or later.

## Is CVE-2020-7932 being exploited?

There is no known exploitation of CVE-2020-7932 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-21376](https://insights.sbomify.com/CVE-2021-21376/): Information Exposure in OMERO.web (medium 6.4)
- [CVE-2021-21377](https://insights.sbomify.com/CVE-2021-21377/): Open Redirect in OMERO.web (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7932 and fix it if it is affected.

What it is: CVE-2020-7932 is a medium-severity vulnerability in n/a, published on 17 Jun 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-7932 in the wild and no public exploit code.

Affected packages and fixed versions:
- omero-web (PyPI): affected all versions; fixed in 5.6.3
- omero-web (PyPI): affected all versions; fixed in 5.6.3
- omero-web (PyPI): affected all versions; fixed in 5.6.3

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-2020-7932/ (Markdown: https://insights.sbomify.com/CVE-2020-7932/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7932
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7932
- OSV: https://osv.dev/vulnerability/CVE-2020-7932

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-7932/
Summaries are generated and may contain mistakes; the official description above is the record.