# CVE-2026-10581: DedeCMS SSRF in download.php

Source: https://junglewise.ai/threats/cve-2026-10581-dedecms-ssrf-in-download-php  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-02. Updated: 2026-06-02  
License: CC BY 4.0 with a link back

CVE-2026-10581 · Severity: medium · CVSS 6.3 · Published 2026-06-02

DedeCMS, a popular content management system, contains a security flaw in its download handling component. An attacker can exploit this to make the server perform unauthorized requests to internal or external systems. This could lead to the exposure of internal network information or unauthorized access to internal services.

Technologies: [DedeCMS](https://junglewise.ai/threats/technologies/dedecms). Vendors: [DedeCMS](https://junglewise.ai/threats/vendors/dedecms).

## Quick answers

**Is CVE-2026-10581 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-10581 being exploited in the wild.

**How severe is CVE-2026-10581?** Medium severity, with a CVSS score of 6.3, published 2 June 2026.

**Which products and versions are affected?** DedeCMS 5.7.88.

**Is there a fix for CVE-2026-10581?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-10581 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-10581?** Check whether you run DedeCMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Server-Side Request Forgery (SSRF) vulnerability exists in DedeCMS 5.7.88 within the /plus/download.php script. The vulnerability is located in the handling of the 'Link' argument, which is processed by the base64_decode function when the 'open' parameter is set to 1. By providing a specially crafted, base64-encoded URL, a remote attacker with low privileges can force the server to initiate outbound requests. This can be used to scan internal networks, bypass firewalls, or interact with internal services that are not otherwise accessible from the internet. Public exploit code is reportedly available.

## Affected products

- DedeCMS DedeCMS 5.7.88

## Timeline

- 2026-06-02: advisory: NVD published the vulnerability record.
- 2026-06-02: disclosed: Vulnerability information and exploit details were made public.

## References

- [https://vuldb.com/cve/CVE-2026-10581](https://vuldb.com/cve/CVE-2026-10581)
- [https://vuldb.com/submit/829404](https://vuldb.com/submit/829404)
- [https://vuldb.com/vuln/367676](https://vuldb.com/vuln/367676)
- [https://vuldb.com/vuln/367676/cti](https://vuldb.com/vuln/367676/cti)

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