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Fencer Vulns
high 8.8

CVE-2020-13778 json

rConfig 3.9.4 and earlier allows authenticated code execution (of system commands) by sending a forged GET request to lib/ajaxHandlers/ajax…

published 2020-10-19 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-5995

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

rConfig 3.9.4 and earlier allows authenticated code execution (of system commands) by sending a forged GET request to lib/ajaxHandlers/ajaxAddTemplate.php or lib/ajaxHandlers/ajaxEditTemplate.php.

Exploit prediction

4.39% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • cxsecurity.com https://cxsecurity.com/issue/WLB-2020100091 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/theguly/exploits/blob/master/CVE-2020-13778.py referenced PoC, tagged "exploit" by a source, unverified
  • theguly.github.io https://theguly.github.io/2020/09/rconfig-3.9.4-multiple-vulnerabilities/ 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 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

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.