CVE-2020-18019: SQL Injection in Xinhu OA System v1.8.3 allows remote attackers to obtain sensitive information by injecting a

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2020-18019 is a high-severity flaw (CVSS 7.5) affecting oa system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL Injection in Xinhu OA System v1.8.3 allows remote attackers to obtain sensitive information by injecting arbitrary commands into the "typeid" variable of the "createfolderAjax" function in the "mode_worcAction.php" component.

Why this priority

High 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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-04-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: xinfu

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

Am I affected?

Timeline

2021-04-28 14:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

xinfu oa system DOWNGRADE

Affected: 1.8.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.8.3

1. Check installed version

apt-cache policy oa-system || rpm -q oa-system || oa-system --version

2. No fixed release: DOWNGRADE to a release before 1.8.3 (Debian / Ubuntu)

apt-cache madison oa-system sudo apt install oa-system=<VERSION_BEFORE_1.8.3> sudo apt-mark hold oa-system

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

dnf --showduplicates list oa-system sudo dnf downgrade oa-system-<VERSION_BEFORE_1.8.3> sudo dnf versionlock add oa-system

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-2020-18019?

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

Is CVE-2020-18019 being exploited?

CVE-2020-18019 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-2020-18019 affect?

CVE-2020-18019 affects oa system. Severity is high (CVSS 7.5). SQL Injection in Xinhu OA System v1.8.3 allows remote attackers to obtain sensitive information by injecting arbitrary commands into the "typeid" variable of the "createfolderAjax" function in the "mode_worcAction.php" component.

How urgent is CVE-2020-18019?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

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References

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