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HIGH

CVE-2023-52425

CVSS v3

7.5

HIGH

EPSS Score

2.1 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • expatAlmaLinux:9all versions · fixed in 2.5.0-1.el9_3.1and 1 other package
  • expatAlmaLinux:8all versions · fixed in 2.2.5-11.el8_9.1and 1 other package
  • xmlrpc-cAlmaLinux:8all versions · fixed in 1.51.0-9.el8_10and 4 other packages

Vendor advisories

  • CVE-2023-52425 Red Hat Product Security223 products fixed · 29 known affected

    expat: parsing large tokens can trigger a denial of service

    expat as a component of Red Hat Enterprise Linux 6 · expat-devel as a component of Red Hat Enterprise Linux 6 · expat.src as a component of Red Hat Enterprise Linux 6

  • RHSA-2025:22871 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: expat security update

  • RHSA-2025:22785 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: expat security update

  • RHSA-2025:22035 Red Hat Product Security5 products fixed

    Red Hat Security Advisory: expat security update

  • RHSA-2025:3453 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 security update

  • ICSA-24-228-06 CISA1 known affected

    Siemens SINEC NMS

    SINEC NMS

9 more advisories

Full record on NVD

Description

libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.

Technical details

Published
2024-02-04

Frequently asked questions

What is CVE-2023-52425?

libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.

Is CVE-2023-52425 actively exploited?

Active exploitation of CVE-2023-52425 has not been confirmed. Its EPSS score was 2.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-52425?

CVE-2023-52425 has a CVSS v3 base score of 7.5 (HIGH severity).

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