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CVE-2018-11803

58
FAUCET Score

CVE-2018-11803 identifies a high-severity vulnerability in Subversion's mod_dav_svn Apache HTTPD module, affecting versions 1.11.0 and 1.10.0-1.10.3, including Apache Ubuntu Linux and Canonical Subversion deployments. This flaw allows an unauthenticated, remote attacker to trigger a denial-of-service (crash) by omitting the root path in a recursive directory listing, due to dereferencing an uninitialized pointer. Rated 7.5 (High) on CVSSv3, the attack complexity is low, primarily impacting system availability. Although not in CISA's KEV catalog and lacking public exploit code, it is marked as "Active" on some tracking lists and has generated community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.10.0, <= 1.10.3CPE matchmatch criteria
cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*
1.11.0CPE matchmatch criteria
cpe:2.3:a:apache:subversion:1.11.0:*:*:*:*:*:*:*
18.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
57.82%
Probability of exploitation in next 30 days
EPSS Percentile
99.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.5782 is in the 98th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: subversion

Vendor Advisories (1)

redhatCVE-2018-11803Moderate

subversion: malicious SVN clients can crash mod_dav_svn

Jan 18, 2019

References

lists.apache.org / thread.html/fa71074862373c142d264534385f8ea5d8d6b80d27f36f3c46f55003%40%3Cdev.subversion.apache.org%3E
security.gentoo.org / glsa/201904-08
Third Party Advisory
usn.ubuntu.com / 3869-1
Third Party Advisory
securityfocus.com / bid/106770
Broken LinkThird Party AdvisoryVDB Entry