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CVE-2024-23807

27
FAUCET Score

CVE-2024-23807 is a critical use-after-free vulnerability (CWE-416) affecting Apache Xerces C++ XML parser versions prior to 3.2.5, specifically triggered during external DTD scanning. With a CVSS score of 9.8, this flaw allows for unauthenticated remote attackers to achieve high impact on confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, immediate patching to version 3.2.5 or disabling DTD processing is strongly recommended to mitigate this severe risk.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 3.2.5CPE matchmatch criteria
cpe:2.3:a:apache:xerces-c\+\+:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.48%
Probability of exploitation in next 30 days
EPSS Percentile
71.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0148 is in the 58th percentile among its peer group of 36,862 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 (5)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 17487-17084Fixed in: 3.2.4-2
microsoftpatch availablevia msrc
Product: 20152-17086Fixed in: 3.2.4-2
microsoftpatch availablevia msrc
Product: azl3 xerces-c 3.2.4-2 on Azure Linux 3.0Fixed in: 3.2.4-2
microsoftpatch availablevia msrc
Product: cbl2 xerces-c 3.2.4-2 on CBL Mariner 2.0Fixed in: 3.2.4-2

Vendor Advisories (2)

redhatCVE-2024-23807Important

xerces-c: duplicate CVE to announce correct fixed-in versions

Feb 16, 2024
microsoft2024-Feb/CVE-2024-23807Important

Apache Xerces C++: Use-after-free on external DTD scan

Feb 13, 2024

References

github.com / apache/xerces-c/pull/54
ExploitPatchThird Party Advisory
lists.apache.org / thread/c497tgn864tsbm8w0bo3f0d81s07zk9r
Mailing ListPatchVendor Advisory