CVE-2018-11803

Subversion's mod_dav_svn Apache HTTPD module versions 1.11.0 and 1.10.0 to 1.10.3 will crash after dereferencing an uninitialized pointer if the client omits the root path in a recursive directory listing operation.

Published: 2019-02-05 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11803 is rated High Risk (69.6/100): CVSS High severity, with high exploitation likelihood (EPSS 57.82%, 99th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +51.26% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-11803

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 6.57% 57.82% +51.26%
2 2026-05-27 10.84% 6.57% -4.28%
3 2026-04-26 — 10.84% —

Full EPSS history (33 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11803

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-11803

OS Trackers for CVE-2018-11803

vendor priority summary link
alpine high CVE-2018-11803: 1 source package rows (subversion); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. https://security.alpinelinux.org/vuln/CVE-2018-11803
debian not yet assigned CVE-2018-11803 not yet assigned priority: Debian including 1 source packages (subversion), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-11803
gentoo normal CVE-2018-11803: 1 GLSA(s) (201904-08), 1 atom(s) (dev-vcs/subversion); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-11803
redhat medium — https://access.redhat.com/security/cve/CVE-2018-11803
suse medium CVE-2018-11803 severity moderate: SUSE including 62 source package names (libsvn_auth_gnome_keyring-1-0, libsvn_auth_gnome_keyring-1-0-1.10.0-3.3.1, …), 117 product×package rows across 32 product lines (SUSE Linux Enterprise Module for Basesystem 15, SUSE Linux Enterprise Module for Basesystem 15 SP1, … (32 product lines)): Fixed 92, Known Not Affected 25. https://www.suse.com/security/cve/CVE-2018-11803/
ubuntu medium CVE-2018-11803 medium priority: Ubuntu including 1 source packages (subversion), 12 status rows across 12 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, trusty, upstream, xenial): not-affected 5, ignored 4, released 2, DNE 1. https://ubuntu.com/security/CVE-2018-11803

Affected software / configurations for CVE-2018-11803

Vendor Product Version Raw CPE
apache subversion >= 1.10.0, <= 1.10.3 cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*
apache subversion 1.11.0 cpe:2.3:a:apache:subversion:1.11.0:*:*:*:*:*:*:*
canonical ubuntu_linux 18.10 cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

References for CVE-2018-11803

cvelogic Threat Intelligence