Is CVE-2019-15903 in the CISA KEV catalog?

No. CVE-2019-15903 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-15903?

CVE-2019-15903 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-15903?

CVE-2019-15903 has an EPSS score of 6.64% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-15903?

Upgrade expat on rocky 8 to 0:2.2.10-1.el8_2 or later. Fixes are available for 25 affected products.

CVE & CISA-KEV Catalog

CVE-2019-15903

HIGHEPSS 93th pctl

7.5

CVSS v3

NVD

Description

In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.

CWE-125Out-of-bounds Read CWE-776

How to fix

Remediation Available

expatRocky

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expatRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-debuginfoRocky

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-debuginfoRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-debugsourceRocky

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-debugsourceRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-develRocky

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-develRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expatUbuntu

Fixed in:2.1.0-4ubuntu1.4+esm2USN-4132-2

Fixed in:2.1.0-7ubuntu0.16.04.5USN-4132-1

Fixed in:2.2.5-3ubuntu0.2USN-4132-1

firefoxUbuntu

Fixed in:70.0+build2-0ubuntu0.16.04.1USN-4165-1

Fixed in:70.0+build2-0ubuntu0.18.04.1USN-4165-1

lib64expat1Ubuntu

Fixed in:2.1.0-4ubuntu1.4+esm2USN-4132-2

Fixed in:2.1.0-7ubuntu0.16.04.5USN-4132-1

libexpat1Ubuntu

Fixed in:2.1.0-4ubuntu1.4+esm2USN-4132-2

Fixed in:2.1.0-7ubuntu0.16.04.5USN-4132-1

Fixed in:2.2.5-3ubuntu0.2USN-4132-1

libvtk5.10Ubuntu

Fixed in:5.10.1+dfsg-2.1ubuntu0.1~esm1USN-4852-1

libvtk5.8Ubuntu

Fixed in:5.8.0-14.1ubuntu3+esm1USN-4852-1

libxmltokUbuntu

Fixed in:1.2-3ubuntu0.16.04.1~esm2USN-5455-1

Fixed in:1.2-4ubuntu0.18.04.1~esm1USN-5455-1

Fixed in:1.2-4ubuntu0.18.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.20.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.20.04.1~esm1USN-5455-1

Fixed in:1.2-4ubuntu0.22.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.22.04.1~esm1USN-5455-1

Fixed in:1.2-4.1ubuntu2.24.0.4.1+esm2USN-7199-1

libxmltok1Ubuntu

Fixed in:1.2-3ubuntu0.16.04.1~esm2USN-5455-1

Fixed in:1.2-4ubuntu0.18.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.18.04.1~esm1USN-5455-1

Fixed in:1.2-4ubuntu0.20.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.20.04.1~esm1USN-5455-1

Fixed in:1.2-4ubuntu0.22.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.22.04.1~esm1USN-5455-1

libxmltok1t64Ubuntu

Fixed in:1.2-4.1ubuntu2.24.0.4.1+esm2USN-7199-1

thunderbirdUbuntu

Fixed in:1:68.7.0+build1-0ubuntu0.16.04.2USN-4335-1

Fixed in:1:68.2.1+build1-0ubuntu0.18.04.1USN-4202-1

vtkUbuntu

Fixed in:5.8.0-14.1ubuntu3+esm1USN-4852-1

Fixed in:5.10.1+dfsg-2.1ubuntu0.1~esm1USN-4852-1

Python 2Windows application

Affected:3.7.0 3.7.5Fixed in:3.7.5Python Software Foundation

Affected:2.7.0 2.7.17Fixed in:2.7.17Python Software Foundation

Affected:3.6.0 3.6.10Fixed in:3.6.10Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Python 3.10Windows application

Affected:3.7.0 3.7.5Fixed in:3.7.5Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Affected:3.6.0 3.6.10Fixed in:3.6.10Python Software Foundation

Affected:2.7.0 2.7.17Fixed in:2.7.17Python Software Foundation

Python 3.11Windows application

Affected:3.6.0 3.6.10Fixed in:3.6.10Python Software Foundation

Affected:2.7.0 2.7.17Fixed in:2.7.17Python Software Foundation

Affected:3.7.0 3.7.5Fixed in:3.7.5Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Python 3.12Windows application

Affected:3.7.0 3.7.5Fixed in:3.7.5Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Affected:2.7.0 2.7.17Fixed in:2.7.17Python Software Foundation

Affected:3.6.0 3.6.10Fixed in:3.6.10Python Software Foundation

Python 3.8Windows application

Affected:2.7.0 2.7.17Fixed in:2.7.17Python Software Foundation

Affected:3.6.0 3.6.10Fixed in:3.6.10Python Software Foundation

Affected:3.7.0 3.7.5Fixed in:3.7.5Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Python 3.9Windows application

Affected:3.7.0 3.7.5Fixed in:3.7.5Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Affected:3.6.0 3.6.10Fixed in:3.6.10Python Software Foundation

Affected:2.7.0 2.7.17Fixed in:2.7.17Python Software Foundation

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

6.64%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Patch2

Exploit1

github.com

Third-Party Advisory44

Other references3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-30.