PatchTheCVECVE-2018-7739: antsle antman before 0.9.1a allows remote attackers to bypass authentication via invalid characters in the use
CVE-2018-7739 is a critical-severity flaw (CVSS 9.8) affecting antman. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- EPSS top 1%: very likely to be exploited
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 53.2% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2018-03-07 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: antMan 0.9.0c - Authentication Bypass
- Exploit-DB: antMan < 0.9.1a - Authentication Bypass
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-7739?
antman: upgrade to newer than 0.9.0c. Exact commands for each OS are on this page.
Is CVE-2018-7739 being exploited?
CVE-2018-7739 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-7739 affect?
CVE-2018-7739 affects antman. Severity is critical (CVSS 9.8). 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 p
How urgent is CVE-2018-7739?
Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action