CVE-2017-0905: The Recurly Client Ruby Library before 2.0.13, 2.1.11, 2.2.5, 2.3.10, 2.4.11, 2.5.4, 2.6.3, 2.7.8, 2.8.2, 2.9.

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2017-0905 is a critical-severity flaw (CVSS 9.8) affecting recurly client ruby. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Recurly Client Ruby Library before 2.0.13, 2.1.11, 2.2.5, 2.3.10, 2.4.11, 2.5.4, 2.6.3, 2.7.8, 2.8.2, 2.9.2, 2.10.4, 2.11.3 is vulnerable to a Server-Side Request Forgery vulnerability in the "Resource#find" method that could result in compromise of API keys or other critical resources.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-918
Published	2017-11-13
Last modified	2026-06-17

Publisher (CNA): HackerOne · Vendor: recurly

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

Am I affected?

Timeline

2017-11-13 17:29 UTCPublished CVE record published
2026-06-17 00:58 UTCUpdated Record last modified

recurly recurly client ruby DOWNGRADE

Affected: 2.0.0 · 2.0.1 · 2.0.2 · 2.0.3 · 2.0.4 · 2.0.5 · 2.0.6 · 2.0.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy recurly-client-ruby || rpm -q recurly-client-ruby || recurly-client-ruby --version

2. No fixed release: DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison recurly-client-ruby sudo apt install recurly-client-ruby=<VERSION_BEFORE_2.0.0> sudo apt-mark hold recurly-client-ruby

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

dnf --showduplicates list recurly-client-ruby sudo dnf downgrade recurly-client-ruby-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add recurly-client-ruby

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.

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-2017-0905?

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

Is CVE-2017-0905 being exploited?

CVE-2017-0905 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-2017-0905 affect?

CVE-2017-0905 affects recurly client ruby. Severity is critical (CVSS 9.8). The Recurly Client Ruby Library before 2.0.13, 2.1.11, 2.2.5, 2.3.10, 2.4.11, 2.5.4, 2.6.3, 2.7.8, 2.8.2, 2.9.2, 2.10.4, 2.11.3 is vulnerable to a Server-Side Request Forgery vulnerability in the "Resource#find" method that could result in

How urgent is CVE-2017-0905?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Ruby vulnerabilities

References

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