How severe is CVE-2018-12907?

CVE-2018-12907 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-12907 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12907?

CVE-2018-12907 affects Rclone. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-12907?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-12907 published?

CVE-2018-12907 was published on 2018-06-27 and last updated on 2026-06-17.

CVE-2018-12907

CVE-2018-12907 is a high-severity vulnerability in Rclone with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Rclone
Published: 2018-06-27
Last modified: 2026-06-17

Description

In Rclone 1.42, use of "rclone sync" to migrate data between two Google Cloud Storage buckets might allow attackers to trigger the transmission of any URL's content to Google, because there is no validation of a URL field received from the Google Cloud Storage API server, aka a "RESTLESS" issue.

Frequently asked questions

What is CVE-2018-12907?: In Rclone 1.42, use of "rclone sync" to migrate data between two Google Cloud Storage buckets might allow attackers to trigger the transmission of any URL's content to Google, because there is no validation of a URL field received from the Google Cloud Storage API server, aka a "RESTLESS" issue.
How severe is CVE-2018-12907?: CVE-2018-12907 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-12907 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12907?: CVE-2018-12907 affects Rclone. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-12907?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-12907 published?: CVE-2018-12907 was published on 2018-06-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rclone:rclone:1.42:*:*:*:*:*:*:*

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