CVE-2022-25235

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Summary

CVECVE-2022-25235
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-02-16 01:15:07 UTC
Updated2026-10-14 16:17:28 UTC
Descriptionxmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.049550000 probability, percentile 0.920410000 (date 2026-10-14)

Problem Types: CWE-116 | n/a | CWE-116 CWE-116 Improper Encoding or Escaping of Output

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1ADPDECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 11.0 All All All
Operating System Fedoraproject Fedora 34 All All All
Operating System Fedoraproject Fedora 35 All All All
Application Libexpat Project Libexpat All All All All
Application Oracle Http Server 12.2.1.3.0 All All All
Application Oracle Http Server 12.2.1.4.0 All All All
Application Oracle Zfs Storage Appliance Kit 8.8 All All All
Application Siemens Sinema Remote Connect Server All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
Oracle Critical Patch Update Advisory - April 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-484086.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
oss-security - Expat 2.4.5 released, includes 5 security fixes af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
Debian -- Security Information -- DSA-5085-1 expat af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
February 2022 Expat Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
[SECURITY] Fedora 34 Update: mingw-expat-2.4.6-1.fc34 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 35 Update: mingw-expat-2.4.6-1.fc35 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] [DLA 2935-1] expat security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
[CVE-2022-25235] lib: Protect against malformed encoding (e.g. malformed UTF-8) by hartwork · Pull Request #562 · libexpat/libexpat · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
Expat: Multiple Vulnerabilities (GLSA 202209-24) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[SECURITY] Fedora 34 Update: mingw-expat-2.4.6-1.fc34 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 35 Update: mingw-expat-2.4.6-1.fc35 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159696 Oracle Enterprise Linux Security Update for firefox (ELSA-2022-0824)
  • 159697 Oracle Enterprise Linux Security Update for firefox (ELSA-2022-0818)
  • 159705 Oracle Enterprise Linux Security Update for thunderbird (ELSA-2022-0845)
  • 159706 Oracle Enterprise Linux Security Update for thunderbird (ELSA-2022-0850)
  • 159712 Oracle Enterprise Linux Security Update for expat (ELSA-2022-0951)
  • 159733 Oracle Enterprise Linux Security Update for expat (ELSA-2022-1069)
  • 159776 Oracle Enterprise Linux Security Update for xmlrpc-c (ELSA-2022-1643)
  • 159782 Oracle Enterprise Linux Security Update for expat (ELSA-2022-9359)
  • 179091 Debian Security Update for expat (DSA 5085-1)
  • 179107 Debian Security Update for expat (DLA 2935-1)
  • 184672 Debian Security Update for expat (CVE-2022-25235)
  • 198671 Ubuntu Security Notification for Expat Vulnerabilities (USN-5288-1)
  • 20259 IBM DB2 Multiple Vulnerabilities (6597637)
  • 240124 Red Hat Update for firefox (RHSA-2022:0817)
  • 240132 Red Hat Update for firefox (RHSA-2022:0824)
  • 240133 Red Hat Update for firefox (RHSA-2022:0818)
  • 240136 Red Hat Update for firefox (RHSA-2022:0816)
  • 240141 Red Hat Update for thunderbird (RHSA-2022:0853)
  • 240142 Red Hat Update for thunderbird (RHSA-2022:0845)
  • 240143 Red Hat Update for thunderbird (RHSA-2022:0843)
  • 240145 Red Hat Update for thunderbird (RHSA-2022:0850)
  • 240155 Red Hat Update for expat (RHSA-2022:0951)
  • 240166 Red Hat Update for expat (RHSA-2022:1012)
  • 240186 Red Hat Update for expat (RHSA-2022:1069)
  • 240187 Red Hat Update for expat (RHSA-2022:1070)
  • 240245 Red Hat Update for xmlrpc-c (RHSA-2022:1540)
  • 240247 Red Hat Update for xmlrpc-c (RHSA-2022:1644)
  • 240251 Red Hat Update for xmlrpc-c (RHSA-2022:1643)
  • 240433 Red Hat Update for thunderbird (RHSA-2022:0847)
  • 240436 Red Hat Update for expat (RHSA-2022:1068)
  • 240794 Red Hat Update for JBoss Core Services (RHSA-2022:7143)
  • 257160 CentOS Security Update for expat (CESA-2022:1069)
  • 257161 CentOS Security Update for firefox (CESA-2022:0824)
  • 257164 CentOS Security Update for thunderbird (CESA-2022:0850)
  • 282449 Fedora Security Update for mingw (FEDORA-2022-3d9d67f558)
  • 282450 Fedora Security Update for mingw (FEDORA-2022-04f206996b)
  • 296057 Oracle Solaris 11.4 Support Repository Update (SRU) 44.113.4 Missing (bulletinapr2022)
  • 330124 IBM AIX Multiple Vulnerabilities in Python (python_advisory)
  • 353198 Amazon Linux Security Advisory for expat : ALAS-2022-1573
  • 353200 Amazon Linux Security Advisory for expat : ALAS2-2022-1764
  • 353262 Amazon Linux Security Advisory for thunderbird : ALAS2-2022-1779
  • 353937 Amazon Linux Security Advisory for xmlrpc-c : ALAS-2022-1585
  • 353940 Amazon Linux Security Advisory for xmlrpc-c : ALAS2-2022-1795
  • 354299 Amazon Linux Security Advisory for xmlrpc-c : ALAS2022-2022-080
  • 354434 Amazon Linux Security Advisory for expat : ALAS2022-2022-232
  • 354490 Amazon Linux Security Advisory for expat : ALAS2022-2022-036
  • 354570 Amazon Linux Security Advisory for expat : ALAS-2022-232
  • 354627 Amazon Linux Security Advisory for expat : AL2012-2022-359
  • 354629 Amazon Linux Security Advisory for xmlrpc-c : AL2012-2022-361
  • 355200 Amazon Linux Security Advisory for xmlrpc-c : ALAS2023-2023-068
  • 355281 Amazon Linux Security Advisory for expat : ALAS2023-2023-058
  • 376583 F5 BIG-IP Application Security Manager (ASM), Local Traffic Manager (LTM), Access Policy Manager (APM) Expat Vulnerability (K19473898)
  • 376986 Alibaba Cloud Linux Security Update for xmlrpc-c (ALINUX3-SA-2022:0035)
  • 377041 Alibaba Cloud Linux Security Update for expat (ALINUX2-SA-2022:0017)
  • 377097 Alibaba Cloud Linux Security Update for expat (ALINUX3-SA-2022:0021)
  • 377786 Alibaba Cloud Linux Security Update for mingw-expat (ALINUX3-SA-2022:0183)
  • 38862 NetApp Data Open Network Technology for Appliance Products (ONTAP) Denial of Service (DoS) Vulnerability (NTAP-20210303-0002)
  • 390283 Oracle Managed Virtualization (VM) Server for x86 Security Update for expat (OVMSA-2023-0009)
  • 44025 Juniper Network Operating System (Junos OS) Multiple Vulnerabilities (JSA70605)
  • 500179 Alpine Linux Security Update for expat
  • 501402 Alpine Linux Security Update for expat
  • 501740 Alpine Linux Security Update for expat
  • 503916 Alpine Linux Security Update for expat
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 6140106 AWS Bottlerocket Security Update for libexpat (GHSA-m5gv-vh63-f8qf)
  • 671565 EulerOS Security Update for expat (EulerOS-SA-2022-1529)
  • 671588 EulerOS Security Update for expat (EulerOS-SA-2022-1562)
  • 671715 EulerOS Security Update for expat (EulerOS-SA-2022-1716)
  • 671757 EulerOS Security Update for expat (EulerOS-SA-2022-1786)
  • 671760 EulerOS Security Update for expat (EulerOS-SA-2022-1803)
  • 671787 EulerOS Security Update for expat (EulerOS-SA-2022-1861)
  • 671796 EulerOS Security Update for expat (EulerOS-SA-2022-1837)
  • 710626 Gentoo Linux Expat Multiple Vulnerabilities (GLSA 202209-24)
  • 751782 SUSE Enterprise Linux Security Update for expat (SUSE-SU-2022:0698-1)
  • 751795 SUSE Enterprise Linux Security Update for expat (SUSE-SU-2022:0713-1)
  • 751810 OpenSUSE Security Update for expat (openSUSE-SU-2022:0713-1)
  • 752302 SUSE Enterprise Linux Security Update for expat (SUSE-SU-2022:2294-1)
  • 753324 SUSE Enterprise Linux Security Update for expat (SUSE-SU-2022:14903-1)
  • 87487 IBM Hypertext Transfer Protocol Server (HTTP Server) Multiple Vulnerabilities (6560814)
  • 900675 Common Base Linux Mariner (CBL-Mariner) Security Update for expat (8601)
  • 901797 Common Base Linux Mariner (CBL-Mariner) Security Update for expat (8603-1)
  • 904940 Common Base Linux Mariner (CBL-Mariner) Security Update for python2 (12411)
  • 904944 Common Base Linux Mariner (CBL-Mariner) Security Update for cmake (12306)
  • 904962 Common Base Linux Mariner (CBL-Mariner) Security Update for mozjs60 (12372)
  • 905012 Common Base Linux Mariner (CBL-Mariner) Security Update for cmake (12479)
  • 940460 AlmaLinux Security Update for firefox (ALSA-2022:0818)
  • 940465 AlmaLinux Security Update for thunderbird (ALSA-2022:0845)
  • 940473 AlmaLinux Security Update for expat (ALSA-2022:0951)
  • 940490 AlmaLinux Security Update for xmlrpc-c (ALSA-2022:1643)
  • 940738 AlmaLinux Security Update for mingw-expat (ALSA-2022:7811)
  • 960566 Rocky Linux Security Update for xmlrpc-c (RLSA-2022:1643)
  • 960832 Rocky Linux Security Update for thunderbird (RLSA-2022:0845)
  • 960834 Rocky Linux Security Update for firefox (RLSA-2022:0818)
  • 960848 Rocky Linux Security Update for expat (RLSA-2022:0951)

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