CVE-2019-17570: An untrusted deserialization was found in the org.apache.xmlrpc.parser.XmlRpcResponseParser:addResult method o

Q: How do I fix CVE-2019-17570?

xml-rpc: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-17570 being exploited?

CVE-2019-17570 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-17570 affect?

CVE-2019-17570 affects xml-rpc, debian linux, ubuntu linux. Severity is critical (CVSS 9.8). An untrusted deserialization was found in the org.apache.xmlrpc.parser.XmlRpcResponseParser:addResult method of Apache XML-RPC (aka ws-xmlrpc) library. A malicious XML-RPC server could target a XML-RPC client causing it to execute arbitrary

Q: How urgent is CVE-2019-17570?

Priority 74/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTDOWNGRADEMITIGATEMITIGATE

CVE-2019-17570 is a critical-severity flaw (CVSS 9.8) affecting xml-rpc, debian linux, ubuntu linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An untrusted deserialization was found in the org.apache.xmlrpc.parser.XmlRpcResponseParser:addResult method of Apache XML-RPC (aka ws-xmlrpc) library. A malicious XML-RPC server could target a XML-RPC client causing it to execute arbitrary code. Apache XML-RPC is no longer maintained and this issue will not be fixed.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	49.3% (top 1%)
CISA exploited list	No
Weakness	CWE-502
Published	2020-01-23
Last modified	2026-06-17

Publisher (CNA): Apache Software Foundation · Vendor: apache · canonical · debian · fedoraproject · redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-01-23 22:15 UTCPublished CVE record published
2026-06-17 02:24 UTCUpdated Record last modified

apache xml-rpc DOWNGRADE

Affected: 3.1 · 3.1.1 · 3.1.2 · 3.1.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1

1. Check installed version

apt-cache policy xml-rpc || rpm -q xml-rpc || xml-rpc --version

2. No fixed release: DOWNGRADE to a release before 3.1 (Debian / Ubuntu)

apt-cache madison xml-rpc sudo apt install xml-rpc=<VERSION_BEFORE_3.1> sudo apt-mark hold xml-rpc

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xml-rpc sudo dnf downgrade xml-rpc-<VERSION_BEFORE_3.1> sudo dnf versionlock add xml-rpc

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

debian debian linux MITIGATE

Affected: 8.0 · 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

canonical ubuntu linux MITIGATE

Affected: 16.04 · 18.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 16.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 31 · 32

Fixed in: no fixed release known

Safe to downgrade to: a release before 31

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat software collections DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy software-collections || rpm -q software-collections || software-collections --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison software-collections sudo apt install software-collections=<VERSION_BEFORE_1.0> sudo apt-mark hold software-collections

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list software-collections sudo dnf downgrade software-collections-<VERSION_BEFORE_1.0> sudo dnf versionlock add software-collections

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Maven · org.apache.xmlrpc:xmlrpc · NO FIX YET · vulnerable: <= 3.1.3 · source

Fedora 46 · shotcut · FIXED · 26.10.30-1.fc46 · FEDORA-2026-7787c7fc2d · source

sudo dnf upgrade --advisory=FEDORA-2026-7787c7fc2d

RHEL 5 · xmlrpc · NOT AFFECTED

RHEL 6 · xmlrpc3 · NOT AFFECTED

RHEL 7 · xmlrpc · DEFERRED

Amazon Linux 2 · see advisory · FIXED · ALAS2-2023-2080 · source

sudo yum update --advisory=ALAS2-2023-2080

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: r00t4dm/CVE-2019-17570 (4 stars)
GitHub PoC: im23pds/xmlrpc-common-deserialization (0 stars)
Write-up: github.com/orangecertcc/security-research/security/advisories/GHSA-x2r6-4m45-m4jp
GitHub PoC: Live-Hack-CVE/CVE-2019-17570

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-17570?

xml-rpc: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-17570 being exploited?

CVE-2019-17570 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-17570 affect?

CVE-2019-17570 affects xml-rpc, debian linux, ubuntu linux. Severity is critical (CVSS 9.8). An untrusted deserialization was found in the org.apache.xmlrpc.parser.XmlRpcResponseParser:addResult method of Apache XML-RPC (aka ws-xmlrpc) library. A malicious XML-RPC server could target a XML-RPC client causing it to execute arbitrary

How urgent is CVE-2019-17570?

Priority 74/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Ubuntu vulnerabilities · Debian vulnerabilities

Related CVEs

CVE-2016-5002 HIGH 7.8 DOWNGRADE XML external entity (XXE) vulnerability in the Apache XML-RPC (aka ws-xmlrpc) library 3.1.3, as used in Apache

References

← Back to latest CVEs