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Fencer Vulns
high 8.8

CVE-2020-25557 json

In CMSuno 1.6.2, an attacker can inject malicious PHP code as a "username" while changing his/her username & password.

published 2020-11-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-18241

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.0%
EPSS 10.0% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

In CMSuno 1.6.2, an attacker can inject malicious PHP code as a "username" while changing his/her username & password. After that, when attacker logs in to the application, attacker's code will be run. As a result of this vulnerability, authenticated user can run command on the server.

Timeline

  1. Published
  2. First public exploit (EDB-49485)

Exploit prediction

9.97% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-49485 CMSUno 1.6.2 - 'lang' Remote Code Execution (Authenticated) webapps, 2021-01-28
  • fatihhcelik.blogspot.com https://fatihhcelik.blogspot.com/2020/09/cmsuno-162-remote-code-execution.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/161162/CMSUno-1.6.2-Remote-Code-Execution.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-94 Improper Control of Generation of Code

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.