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Fencer Vulns
critical 9.8

CVE-2018-7739 in the critical feed json

antsle antman before 0.9.1a allows remote attackers to bypass authentication via invalid characters in the username and password parameters…

published 2018-03-06 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19454

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
53.2%
EPSS 53.2% chance of exploitation in 30 days, percentile 98%
public exploits
2
Exploit-DB

Summary

antsle antman before 0.9.1a allows remote attackers to bypass authentication via invalid characters in the username and password parameters, as demonstrated by a username=>&password=%0a string to the /login URI. This allows obtaining root permissions within the web management console, because the login process uses Java's ProcessBuilder class and a bash script called antsle-auth with insufficient input validation.

Timeline

  1. First public exploit (EDB-44220)
  2. Published

Exploit prediction

53.23% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-44262 antMan 0.9.0c - Authentication Bypass webapps, 2018-03-07
  • EDB-44220 antMan < 0.9.1a - Authentication Bypass webapps, 2018-03-02
  • blog.codecatoctin.com http://blog.codecatoctin.com/2018/02/antman-authentication-bypass.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

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.