# CVE-2021-27924: Information disclosure in n/a

> Couchbase Server logs session cookies insecurely, allowing attackers with log access to impersonate users and take over accounts.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-gxpm-63fr-38v5

## What is CVE-2021-27924?

CVE-2021-27924 is a medium-severity vulnerability in Couchbase Couchbase Server, published on 19 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Couchbase Server 6.x through 6.6.1. The Couchbase Server UI is insecurely logging session cookies in the logs. This allows for the impersonation of a user if the log files are obtained by an attacker before a session cookie expires.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information)

## Which versions are affected by CVE-2021-27924?

It affects 1 product.


Products: Couchbase Couchbase Server.

## How do I fix CVE-2021-27924?

No fix has been published for CVE-2021-27924 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27924 being exploited?

There is no known exploitation of CVE-2021-27924 in the wild and no public exploit code.

## Other vulnerabilities in Couchbase Couchbase Server

- [CVE-2024-0519](https://insights.sbomify.com/CVE-2024-0519/): Google Chromium V8 Out-of-Bounds Memory Access (high 8.8, exploited in the wild)
- [CVE-2023-3079](https://insights.sbomify.com/CVE-2023-3079/): Google Chromium V8 Type Confusion (high 8.8, exploited in the wild)
- [CVE-2023-2033](https://insights.sbomify.com/CVE-2023-2033/): Google Chromium V8 Type Confusion (high 8.8, exploited in the wild)
- [CVE-2023-49930](https://insights.sbomify.com/CVE-2023-49930/): Missing authorization in n/a (critical 9.8)
- [CVE-2023-49931](https://insights.sbomify.com/CVE-2023-49931/): Missing authorization in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27924 and fix it if it is affected.

What it is: CVE-2021-27924 is a medium-severity vulnerability in Couchbase Couchbase Server, published on 19 May 2021. 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-2021-27924 in the wild and no public exploit code.

Affected product: Couchbase Couchbase Server. 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-2021-27924/ (Markdown: https://insights.sbomify.com/CVE-2021-27924/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27924
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27924
- OSV: https://osv.dev/vulnerability/CVE-2021-27924

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27924/
Summaries are generated and may contain mistakes; the official description above is the record.