Rubedo - Directory Traversal (CVE-2018-16836)
Description
Rubedo through 3.4.0 contains a Directory Traversal vulnerability in the theme component, allowing unauthenticated attackers to read and execute arbitrary files outside of the service root path, as demonstrated by a /theme/default/img/%2e%2e/..//etc/passwd URI.
psychologyCrowdSec Analysis
CVE-2018-16836 is a critical directory traversal vulnerability in Rubedo that allows unauthenticated attackers to access and potentially execute files outside the intended service root path through crafted requests.
CrowdSec has been tracking this vulnerability and its exploits since 2nd of April 2025.
According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2018-16836 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2018-16836. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.
Attackers are focusing on URLs containing /theme/default/img/ with directory traversal patterns to exploit this issue.
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| Event | Date |
|---|---|
| CVE Published | 2018-09-11 |
| Rule Released | 2025-04-02 |
| CrowdSec First Seen | 2025-04-07 |