How severe is CVE-2020-35370?

CVE-2020-35370 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-35370 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35370?

CVE-2020-35370 affects Raysync. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35370?

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-2020-35370 published?

CVE-2020-35370 was published on 2020-12-23 and last updated on 2026-06-17.

CVE-2020-35370

CVE-2020-35370 is a high-severity vulnerability in Raysync with a CVSS 3.x base score of 8.8. 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.3
EPSS exploit prediction: 7% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Raysync
Published: 2020-12-23
Last modified: 2026-06-17

Description

A RCE vulnerability exists in Raysync below 3.3.3.8. An unauthenticated unauthorized attacker sending a specifically crafted request to override the specific file in server with malicious content can login as "admin", then to modify specific shell file to achieve remote code execution(RCE) on the hosting server.

Frequently asked questions

What is CVE-2020-35370?: A RCE vulnerability exists in Raysync below 3.3.3.8. An unauthenticated unauthorized attacker sending a specifically crafted request to override the specific file in server with malicious content can login as "admin", then to modify specific shell file to achieve remote code execution(RCE) on the hosting server.
How severe is CVE-2020-35370?: CVE-2020-35370 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-35370 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35370?: CVE-2020-35370 affects Raysync. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35370?: 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-2020-35370 published?: CVE-2020-35370 was published on 2020-12-23 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/49265

Affected products (1)

cpe:2.3:a:raysync:raysync:*:*:*:*:*:*:*:*

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