How severe is CVE-2017-8303?

CVE-2017-8303 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-8303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8303?

CVE-2017-8303 affects Accellion File Transfer Appliance. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-8303?

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

When was CVE-2017-8303 published?

CVE-2017-8303 was published on 2017-05-05 and last updated on 2026-06-17.

CVE-2017-8303

CVE-2017-8303 is a critical-severity vulnerability in Accellion File Transfer Appliance with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 24% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-116.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 24% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-116
Affected product: Accellion File Transfer Appliance
Published: 2017-05-05
Last modified: 2026-06-17

Description

An issue was discovered on Accellion FTA devices before FTA_9_12_180. seos/1000/find.api allows Remote Code Execution with shell metacharacters in the method parameter.

Frequently asked questions

What is CVE-2017-8303?: An issue was discovered on Accellion FTA devices before FTA_9_12_180. seos/1000/find.api allows Remote Code Execution with shell metacharacters in the method parameter.
How severe is CVE-2017-8303?: CVE-2017-8303 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-8303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8303?: CVE-2017-8303 affects Accellion File Transfer Appliance. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-8303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-8303 published?: CVE-2017-8303 was published on 2017-05-05 and last updated on 2026-06-17.

References

https://gist.github.com/anonymous/32e2894fa29176f3f32cb2b2bb7c24cb

Affected products (1)

cpe:2.3:a:accellion:file_transfer_appliance:*:*:*:*:*:*:*:*

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