CVE-2017-9355: XML external entity (XXE) vulnerability in the import playlist feature in Subsonic 6.1.1 might allow remote at

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HIGH 7.4DOWNGRADE

CVE-2017-9355 is a high-severity flaw (CVSS 7.4) affecting subsonic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XML external entity (XXE) vulnerability in the import playlist feature in Subsonic 6.1.1 might allow remote attackers to conduct server-side request forgery (SSRF) attacks via a crafted XSPF playlist file.

Why this priority

High severity
EPSS top 2%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	26.9% (top 2%)
CISA exploited list	No
Weakness	CWE-918
Published	2017-06-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: subsonic

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-06-07 19:29 UTCPublished CVE record published
2026-06-17 01:27 UTCUpdated Record last modified

subsonic subsonic DOWNGRADE

Affected: 6.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.1.1

1. Check installed version

apt-cache policy subsonic || rpm -q subsonic || subsonic --version

2. No fixed release: DOWNGRADE to a release before 6.1.1 (Debian / Ubuntu)

apt-cache madison subsonic sudo apt install subsonic=<VERSION_BEFORE_6.1.1> sudo apt-mark hold subsonic

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list subsonic sudo dnf downgrade subsonic-<VERSION_BEFORE_6.1.1> sudo dnf versionlock add subsonic

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Subsonic 6.1.1 - XML External Entity Injection

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-9355?

subsonic: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-9355 being exploited?

CVE-2017-9355 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-9355 affect?

CVE-2017-9355 affects subsonic. Severity is high (CVSS 7.4). XML external entity (XXE) vulnerability in the import playlist feature in Subsonic 6.1.1 might allow remote attackers to conduct server-side request forgery (SSRF) attacks via a crafted XSPF playlist file.

How urgent is CVE-2017-9355?

Priority 55/100. High severity; EPSS top 2%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2018-9282 MEDIUM 6.1 DOWNGRADE An XSS issue was discovered in Subsonic Media Server 6.1.1
CVE-2018-6014 MEDIUM 6.5 DOWNGRADE Subsonic v6.1.3 has an insecure allow-access-from domain="*" Flash cross-domain policy that allows an attacker
CVE-2018-20228 HIGH 8.0 DOWNGRADE Subsonic V6.1.5 allows internetRadioSettings.view streamUrl CSRF, with resultant SSRF.
CVE-2018-14691 MEDIUM 6.1 DOWNGRADE An issue was discovered in Subsonic 6.1.1
CVE-2018-14690 MEDIUM 6.1 DOWNGRADE An issue was discovered in Subsonic 6.1.1

References

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