How severe is CVE-2018-11803?

CVE-2018-11803 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-11803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 58% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11803?

CVE-2018-11803 primarily affects Apache Subversion. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-11803?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-11803 published?

CVE-2018-11803 was published on 2019-02-05 and last updated on 2026-06-17.

CVE-2018-11803

CVE-2018-11803 is a high-severity vulnerability in Apache Subversion with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 58% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-824.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 58% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-824
Affected product: Apache Subversion
Published: 2019-02-05
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2018-11803?: CVE-2018-11803 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-11803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 58% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11803?: CVE-2018-11803 primarily affects Apache Subversion. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-11803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-11803 published?: CVE-2018-11803 was published on 2019-02-05 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:subversion:1.11.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

More vulnerabilities in Apache Subversion

CVE-2017-9800 — Critical (CVSS 9.8): A maliciously constructed svn+ssh:// URL would cause Subversion clients before 1.8.19, 1.9.x before 1.9.7, and 1.10.0.x…
CVE-2013-4246 — High (CVSS 8.8): libsvn_fs_fs/fs_fs.c in Apache Subversion 1.8.x before 1.8.2 might allow remote authenticated users with commit access…
CVE-2015-5259 — High (CVSS 8.6): Integer overflow in the read_string function in libsvn_ra_svn/marshal.c in Apache Subversion 1.9.x before 1.9.3 allows…
CVE-2024-45720 — High (CVSS 8.2): On Windows platforms, a "best fit" character encoding conversion of command line arguments to Subversion's executables…
CVE-2015-0202 — High (CVSS 7.8): The mod_dav_svn server in Subversion 1.8.0 through 1.8.11 allows remote attackers to cause a denial of service (memory…
CVE-2013-2112 — High (CVSS 7.8): The svnserve server in Subversion before 1.6.23 and 1.7.x before 1.7.10 allows remote attackers to cause a denial of…

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Other CWE-824 vulnerabilities

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CVE-2022-46280 — Critical (CVSS 9.8): A use of uninitialized pointer vulnerability exists in the PQS format pFormat functionality of Open Babel 3.1.1 and…
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