# CVE-2020-29047: Deserialization in n/a

> Remote attackers can execute arbitrary code via unsafe deserialization of a cookie in the wp-hotel-booking WordPress plugin.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Mar 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-x3pf-797q-q9j6

## What is CVE-2020-29047?

CVE-2020-29047 is a critical unsafe deserialization vulnerability in n/a, published on 3 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The wp-hotel-booking plugin through 1.10.2 for WordPress allows remote attackers to execute arbitrary code because of an unserialize operation on the thimpress_hotel_booking_1 cookie in load in includes/class-wphb-sessions.php.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2020-29047?

It affects 1 product.


Products: Thimpress Wp Hotel Booking.

## How do I fix CVE-2020-29047?

No fix has been published for CVE-2020-29047 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-29047 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-29047 exists.

Public exploit code:

- WP Hotel Booking < 1.10.4 - PHP Object Injection (nuclei): http/cves/2020/CVE-2020-29047.yaml

## Other vulnerabilities in n/a

- [CVE-2024-3605](https://insights.sbomify.com/CVE-2024-3605/): WP Hotel Booking <= 2.1.0 - Unauthenticated SQL Injection (critical 10.0)
- [CVE-2023-5652](https://insights.sbomify.com/CVE-2023-5652/): WP Hotel Booking < 2.0.8 - Unauthenticated SQLi (critical 9.8)
- [CVE-2024-7855](https://insights.sbomify.com/CVE-2024-7855/): WP Hotel Booking <= 2.1.2 - Authenticated (Subscriber+) Arbitrary File Upload (high 8.8)
- [CVE-2024-51582](https://insights.sbomify.com/CVE-2024-51582/): WordPress WP Hotel Booking plugin <= 2.2.9 - Local File Inclusion vulnerability (high 7.5)
- [CVE-2024-30508](https://insights.sbomify.com/CVE-2024-30508/): WordPress WP Hotel Booking plugin <= 2.0.9.2 - Broken Access Control vulnerability (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-29047 and fix it if it is affected.

What it is: CVE-2020-29047 is a critical unsafe deserialization vulnerability in n/a, published on 3 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-29047 exists.

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-2020-29047/ (Markdown: https://insights.sbomify.com/CVE-2020-29047/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-29047
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-29047
- OSV: https://osv.dev/vulnerability/CVE-2020-29047

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-29047/
Summaries are generated and may contain mistakes; the official description above is the record.