# CVE-2025-53690: Sitecore Multiple Products Deserialization of Untrusted Data

> Untrusted data deserialization in Sitecore XM and XP allows attackers to execute arbitrary code, requiring immediate upgrades.

- **Severity:** Critical 9.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 4 Sep 2025 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Sep 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-g5r9-cgwv-wmpc

## What is CVE-2025-53690?

CVE-2025-53690 is a critical unsafe deserialization vulnerability in Sitecore Experience Manager (XM), published on 3 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Code Injection.This issue affects Experience Manager (XM): through 9.0; Experience Platform (XP): through 9.0.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2025-53690?

It affects 4 products.


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

## How do I fix CVE-2025-53690?

No fix has been published for CVE-2025-53690 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 25 Sep 2025.

## Is CVE-2025-53690 being exploited?

Yes. Attackers have exploited CVE-2025-53690 in the wild since at least 4 Sep 2025.

Public exploit code:

- CVE-2025-53690 POC (github_poc): https://github.com/ErikLearningSec/CVE-2025-53690-POC
- Detection for CVE-2025-53690 (github_poc): https://github.com/rxerium/CVE-2025-53690
- This is CVE-2025-53690 Analysis Documents. (github_poc): https://github.com/m0d0ri205/CVE-2025-53690-Analysis

## Other vulnerabilities in Sitecore Experience Manager (XM)

- [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-2025-53691](https://insights.sbomify.com/CVE-2025-53691/): Sitecore Experience Remote Code Execution through Insecure Deserialization (high 8.8)
- [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-2025-53690 and fix it if it is affected.

What it is: CVE-2025-53690 is a critical unsafe deserialization vulnerability in Sitecore Experience Manager (XM), published on 3 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2025-53690 in the wild since at least 4 Sep 2025.

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-2025-53690/ (Markdown: https://insights.sbomify.com/CVE-2025-53690/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-53690
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-53690
- OSV: https://osv.dev/vulnerability/CVE-2025-53690

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-53690/
Summaries are generated and may contain mistakes; the official description above is the record.