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CVE-2018-9109

30
FAUCET Score

CVE-2018-9109 is a critical directory traversal vulnerability affecting Studio 42 elFinder versions prior to 2.1.36. This flaw, located in the zipdl() function of elFinder.class.php, allows unauthenticated remote attackers to download arbitrary files accessible by the web server and delete files owned by the web server process. With a CVSS score of 9.1 (CRITICAL), it presents a high risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality and integrity. While there is no evidence of active exploitation or public exploit code in Metasploit or ExploitDB, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.36CPE matchmatch criteria
cpe:2.3:a:std42:elfinder:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.96%
Probability of exploitation in next 30 days
EPSS Percentile
85.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0296 is in the 77th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: studio-42/elfinderFixed in: 2.1.36
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-45x3-mw7q-wf7fcritical

elFinder Path Traversal vulnerability

May 13, 2022

References

github.com / Studio-42/elFinder/commit/157f471d7e48f190f74e66eb5bc73360b5352fd3
PatchThird Party Advisory
github.com / Studio-42/elFinder/releases/tag/2.1.36
Release NotesThird Party Advisory
github.com / Studio-42/elFinder/wiki/Advisory-about-vulnerability-of-CVE-2018-9109-and-CVE-2018-9110
MitigationThird Party Advisory