CVE-2020-10569: SysAid On-Premise 20.1.11, by default, allows the AJP protocol port, which is vulnerable to a GhostCat attack

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-10569 is a critical-severity flaw (CVSS 9.8) affecting on-premise. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SysAid On-Premise 20.1.11, by default, allows the AJP protocol port, which is vulnerable to a GhostCat attack. Additionally, it allows unauthenticated access to upload files, which can be used to execute commands on the system by chaining it with a GhostCat attack. NOTE: This may be a duplicate of CVE-2020-1938

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	3.3% (top 12%)
CISA exploited list	No
Weakness	CWE-434
Published	2020-04-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sysaid

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

Am I affected?

Timeline

2020-04-21 19:15 UTCPublished CVE record published
2026-06-17 02:48 UTCUpdated Record last modified

sysaid on-premise DOWNGRADE

Affected: 20.1.11

Fixed in: no fixed release known

Safe to downgrade to: a release before 20.1.11

1. Check installed version

apt-cache policy on-premise || rpm -q on-premise || on-premise --version

2. No fixed release: DOWNGRADE to a release before 20.1.11 (Debian / Ubuntu)

apt-cache madison on-premise sudo apt install on-premise=<VERSION_BEFORE_20.1.11> sudo apt-mark hold on-premise

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

dnf --showduplicates list on-premise sudo dnf downgrade on-premise-<VERSION_BEFORE_20.1.11> sudo dnf versionlock add on-premise

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-2020-10569?

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

Is CVE-2020-10569 being exploited?

CVE-2020-10569 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-2020-10569 affect?

CVE-2020-10569 affects on-premise. Severity is critical (CVSS 9.8). SysAid On-Premise 20.1.11, by default, allows the AJP protocol port, which is vulnerable to a GhostCat attack. Additionally, it allows unauthenticated access to upload files, which can be used to execute commands on the system by chaining i

How urgent is CVE-2020-10569?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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