CVE-2020-9352: An issue was discovered in SmartClient 12.0

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-9352 is a critical-severity flaw (CVSS 9.8) affecting smartclient. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in SmartClient 12.0. Unauthenticated exploitation of blind XXE can occur in the downloadWSDL feature by sending a POST request to /tools/developerConsoleOperations.jsp with a valid payload in the _transaction parameter. NOTE: the documentation states "These tools are, by default, available to anyone ... so they should only be deployed into a trusted environment. Alternately, the tools can easily be restricted to administra

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-611
Published	2020-02-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: smartclient

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

Am I affected?

Timeline

2020-02-23 02:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

smartclient smartclient DOWNGRADE

Affected: 12.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.0

1. Check installed version

apt-cache policy smartclient || rpm -q smartclient || smartclient --version

2. No fixed release: DOWNGRADE to a release before 12.0 (Debian / Ubuntu)

apt-cache madison smartclient sudo apt install smartclient=<VERSION_BEFORE_12.0> sudo apt-mark hold smartclient

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

dnf --showduplicates list smartclient sudo dnf downgrade smartclient-<VERSION_BEFORE_12.0> sudo dnf versionlock add smartclient

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.

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-2020-9352?

smartclient: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-9352 being exploited?

CVE-2020-9352 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-2020-9352 affect?

CVE-2020-9352 affects smartclient. Severity is critical (CVSS 9.8). An issue was discovered in SmartClient 12.0. Unauthenticated exploitation of blind XXE can occur in the downloadWSDL feature by sending a POST request to /tools/developerConsoleOperations.jsp with a valid payload in the _transaction paramet

How urgent is CVE-2020-9352?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-9354 HIGH 7.5 DOWNGRADE An issue was discovered in SmartClient 12.0
CVE-2020-9353 HIGH 7.5 DOWNGRADE An issue was discovered in SmartClient 12.0
CVE-2020-9351 MEDIUM 5.3 DOWNGRADE An issue was discovered in SmartClient 12.0

References

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