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Fencer Vulns
high 8.8

CVE-2020-8639 in the critical feed json

An unrestricted file upload vulnerability in keywordsImport.php in TestLink 1.9.20 allows remote attackers to execute arbitrary code by upl…

published 2020-04-03 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29487

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.9%
EPSS 15.9% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

Timeline

  1. Published
  2. First public exploit (EDB-49561)

Exploit prediction

15.86% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-49561 TestLink 1.9.20 - Unrestricted File Upload (Authenticated) webapps, 2021-02-15
  • ackcent.com https://ackcent.com/blog/testlink-1.9.20-unrestricted-file-upload-and-sql-injection/ referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/161401/TestLink-1.9.20-Shell-Upload.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.