CVE-2025-3999: A vulnerability, which was classified as problematic, has been found in Seeyon Zhiyuan OA Web Application Syst

Routine

LOW 3.5DOWNGRADE

CVE-2025-3999 is a low-severity flaw (CVSS 3.5) affecting oa web application system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability, which was classified as problematic, has been found in Seeyon Zhiyuan OA Web Application System 8.1 SP2. This issue affects some unknown processing of the file seeyon\opt\Seeyon\A8\ApacheJetspeed\webapps\seeyon\common\js\addDate\date.jsp of the component URL Parameter Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-79, CWE-94
Published	2025-04-28
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: seeyon

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

Am I affected?

Timeline

2025-04-28 04:15 UTCPublished CVE record published
2026-06-17 09:21 UTCUpdated Record last modified

seeyon oa web application system DOWNGRADE

Affected: 8.1 sp2

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 8.1 (Debian / Ubuntu)

apt-cache madison oa-web-application-system sudo apt install oa-web-application-system=<VERSION_BEFORE_8.1> sudo apt-mark hold oa-web-application-system

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

dnf --showduplicates list oa-web-application-system sudo dnf downgrade oa-web-application-system-<VERSION_BEFORE_8.1> sudo dnf versionlock add oa-web-application-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-2025-3999?

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

Is CVE-2025-3999 being exploited?

CVE-2025-3999 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-2025-3999 affect?

CVE-2025-3999 affects oa web application system. Severity is low (CVSS 3.5). A vulnerability, which was classified as problematic, has been found in Seeyon Zhiyuan OA Web Application System 8.1 SP2. This issue affects some unknown processing of the file seeyon\opt\Seeyon\A8\ApacheJetspeed\webapps\seeyon\common\js\ad

How urgent is CVE-2025-3999?

Priority 18/100. No elevated risk signals yet.

Related CVEs

CVE-2025-4531 MEDIUM 6.3 DOWNGRADE A vulnerability was found in Seeyon Zhiyuan OA Web Application System 8.1 SP2
CVE-2025-4529 MEDIUM 4.3 DOWNGRADE A vulnerability was found in Seeyon Zhiyuan OA Web Application System 8.1 SP2
CVE-2025-4000 LOW 3.5 DOWNGRADE A vulnerability, which was classified as problematic, was found in Seeyon Zhiyuan OA Web Application System 8.

References

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