CVE-2025-15421: A vulnerability was detected in Yonyou KSOA 9.0

This week

HIGH 7.3REMOTEDOWNGRADE

CVE-2025-15421 is a high-severity flaw (CVSS 7.3) affecting ksoa. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was detected in Yonyou KSOA 9.0. This vulnerability affects unknown code of the file /worksheet/agent_worksadd.jsp of the component HTTP GET Parameter Handler. The manipulation of the argument ID results in sql injection. The attack can be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

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	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-74, CWE-89
Published	2026-01-02
Last modified	2026-10-07

Publisher (CNA): VulDB · Vendor: yonyou

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-02 01:15 UTCPublished CVE record published
2026-10-07 11:10 UTCUpdated Record last modified

yonyou ksoa DOWNGRADE

Affected: 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 9.0 (Debian / Ubuntu)

apt-cache madison ksoa sudo apt install ksoa=<VERSION_BEFORE_9.0> sudo apt-mark hold ksoa

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

dnf --showduplicates list ksoa sudo dnf downgrade ksoa-<VERSION_BEFORE_9.0> sudo dnf versionlock add ksoa

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-2025-15421?

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

Is CVE-2025-15421 being exploited?

CVE-2025-15421 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-2025-15421 affect?

CVE-2025-15421 affects ksoa. Severity is high (CVSS 7.3). A vulnerability was detected in Yonyou KSOA 9.0. This vulnerability affects unknown code of the file /worksheet/agent_worksadd.jsp of the component HTTP GET Parameter Handler. The manipulation of the argument ID results in sql injection. Th

How urgent is CVE-2025-15421?

Priority 45/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-15425 HIGH 7.3 DOWNGRADE A vulnerability was determined in Yonyou KSOA 9.0
CVE-2025-15420 HIGH 7.3 DOWNGRADE A security vulnerability has been detected in Yonyou KSOA 9.0
CVE-2025-15424 HIGH 7.3 DOWNGRADE A vulnerability was found in Yonyou KSOA 9.0
CVE-2025-15436 HIGH 7.3 DOWNGRADE A vulnerability has been found in Yonyou KSOA 9.0
CVE-2025-15434 HIGH 7.3 DOWNGRADE A vulnerability was detected in Yonyou KSOA 9.0

References

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