# CVE-2025-53691: Sitecore Experience Remote Code Execution through Insecure Deserialization

> Attackers can achieve remote code execution in Sitecore Experience Manager and Platform via insecure deserialization of untrusted data.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Sep 2025
- **Updated:** 3 Sep 2025
- **Also known as:** GHSA-cpg3-c796-vg5v

## What is CVE-2025-53691?

CVE-2025-53691 is a high-severity unsafe deserialization vulnerability in Sitecore Experience Manager (XM), published on 3 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Remote Code Execution (RCE).This issue affects Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 through 9.3, from 10.0 through 10.4.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2025-53691?

It affects 4 products.


Products: Sitecore Experience Commerce, Sitecore Experience Manager, Sitecore Experience Platform, Sitecore Managed Cloud.

## How do I fix CVE-2025-53691?

No fix has been published for CVE-2025-53691 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-53691 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-53691 exists.

Public exploit code:

- Remote code execution (RCE) through insecure deserialization (github_poc): https://github.com/blueisbeautiful/CVE-2025-53691

## Other vulnerabilities in Sitecore Experience Manager (XM)

- [CVE-2025-53690](https://insights.sbomify.com/CVE-2025-53690/): Sitecore Multiple Products Deserialization of Untrusted Data (critical 9.0, exploited in the wild)
- [CVE-2025-53693](https://insights.sbomify.com/CVE-2025-53693/): HTML Cache Poisoning through Unsafe Reflections (critical 9.8)
- [CVE-2023-35813](https://insights.sbomify.com/CVE-2023-35813/): Code injection in n/a (critical 9.8)
- [CVE-2025-34510](https://insights.sbomify.com/CVE-2025-34510/): Sitecore XM, XC, and XP Post-Auth RCE via Zip Slip (high 8.8)
- [CVE-2025-34511](https://insights.sbomify.com/CVE-2025-34511/): Sitecore PowerShell Extension RCE via Unrestricted Upload (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-53691 and fix it if it is affected.

What it is: CVE-2025-53691 is a high-severity unsafe deserialization vulnerability in Sitecore Experience Manager (XM), published on 3 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-53691 exists.

Affected product: Sitecore Experience Manager (XM). 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-2025-53691/ (Markdown: https://insights.sbomify.com/CVE-2025-53691/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-53691
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-53691
- OSV: https://osv.dev/vulnerability/CVE-2025-53691

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-53691/
Summaries are generated and may contain mistakes; the official description above is the record.