Server-side request forgery (SSRF) vulnerability in Downloader in Synology Download Station 3.8.x before 3.8.5-3475 and 3.x before 3.5-2984
Server-side request forgery (SSRF) vulnerability in Downloader in Synology Download Station 3.8.x before 3.8.5-3475 and 3.x before 3.5-2984 allows remote authenticated users to download arbitrary local files via crafted URI.
- Published
- Aug 14, 2017
- Updated
- Jun 16, 2026
- EPSS
- 1.6% · 75th percentile
- CWE
- CWE-918
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Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.6%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| synology | download station | cpe:2.3:a:synology:download_station |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- synology download station3.2-2295
- synology download station3.3-2382
- synology download station3.3-2383
- synology download station3.3-2386
- synology download station3.4-2477
- synology download station3.4-2478
- synology download station3.4-2480
- synology download station3.4-2485
- synology download station3.4-2486
- synology download station3.4-2489
- synology download station3.4-2490
- synology download station3.4-2514
- synology download station3.4-2555
- synology download station3.4-2557
- synology download station3.4-2558
- synology download station3.5-2638
- synology download station3.5-2705
- synology download station3.5-2706
- synology download station3.5-2955
- synology download station3.5-2956
Versions reported by the vendor
Affected version ranges reported by the assigning authority (synology). Independent of NVD's CPE analysis and usually ahead of it.
Synology Synology Download Station
- 3.8.x before 3.8.5-3475 and 3.x before 3.5-2984affected
Same product
synology: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-34809Improper neutralization of special elements used in a command ('Command Injection') vulnerability in task management component in Synology D36Monitor
- CVE-2021-34810Improper privilege management vulnerability in cgi component in Synology Download Station before 3.8.16-3566 allows remote authenticated use35Monitor
- CVE-2017-11156Synology Download Station 3.8.x before 3.8.5-3475 and 3.x before 3.5-2984 uses weak permissions (0777) for ui/dlm/btsearch directory, which 32Monitor
- CVE-2021-33184Server-Side request forgery (SSRF) vulnerability in task management component in Synology Download Station before 3.8.15-3563 allows remote 30Monitor
- CVE-2015-6913Cross-site scripting (XSS) vulnerability in the "Create download task via URL" feature in Synology Download Station before 3.5-2967 allows r18Monitor
- CVE-2015-6909Cross-site scripting (XSS) vulnerability in the "Create download task via file upload" feature in Synology Download Station before 3.5-2962 18Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
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Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-918 · Server-Side Request Forgery (SSRF)CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
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Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.