How severe is CVE-2020-8639?

CVE-2020-8639 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8639?

CVE-2020-8639 affects Testlink. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8639?

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-2020-8639 published?

CVE-2020-8639 was published on 2020-04-03 and last updated on 2026-06-17.

CVE-2020-8639

CVE-2020-8639 is a high-severity vulnerability in Testlink with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 16% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 16% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Testlink
Published: 2020-04-03
Last modified: 2026-06-17

Description

An unrestricted file upload vulnerability in keywordsImport.php in TestLink 1.9.20 allows remote attackers to execute arbitrary code by uploading a file with an executable extension. This allows an authenticated attacker to upload a malicious file (containing PHP code to execute operating system commands) to a publicly accessible directory of the application.

Frequently asked questions

What is CVE-2020-8639?: An unrestricted file upload vulnerability in keywordsImport.php in TestLink 1.9.20 allows remote attackers to execute arbitrary code by uploading a file with an executable extension. This allows an authenticated attacker to upload a malicious file (containing PHP code to execute operating system commands) to a publicly accessible directory of the application.
How severe is CVE-2020-8639?: CVE-2020-8639 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8639?: CVE-2020-8639 affects Testlink. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8639?: 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-2020-8639 published?: CVE-2020-8639 was published on 2020-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:testlink:testlink:1.9.20:*:*:*:*:*:*:*

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