CVE-2025-56451: Cross site scripting vulnerability in seeyon Zhiyuan A8+ Collaborative Management Software 7.0 via the topValu

Routine

MEDIUM 6.1DOWNGRADE

CVE-2025-56451 is a medium-severity flaw (CVSS 6.1) affecting a8\+ collaborative management. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross site scripting vulnerability in seeyon Zhiyuan A8+ Collaborative Management Software 7.0 via the topValue parameter to the seeyon/main.do endpoint.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: seeyon

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

Am I affected?

Timeline

2026-01-16 22:16 UTCPublished CVE record published
2026-06-17 09:42 UTCUpdated Record last modified

seeyon a8\+ collaborative management DOWNGRADE

Affected: 7.0 sp3

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

1. Check installed version

apt-cache policy a8+-collaborative-management || rpm -q a8+-collaborative-management || a8+-collaborative-management --version

2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)

apt-cache madison a8+-collaborative-management sudo apt install a8+-collaborative-management=<VERSION_BEFORE_7.0> sudo apt-mark hold a8+-collaborative-management

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

dnf --showduplicates list a8+-collaborative-management sudo dnf downgrade a8+-collaborative-management-<VERSION_BEFORE_7.0> sudo dnf versionlock add a8+-collaborative-management

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-2025-56451?

a8\+ collaborative management: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-56451 being exploited?

CVE-2025-56451 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-2025-56451 affect?

CVE-2025-56451 affects a8\+ collaborative management. Severity is medium (CVSS 6.1). Cross site scripting vulnerability in seeyon Zhiyuan A8+ Collaborative Management Software 7.0 via the topValue parameter to the seeyon/main.do endpoint.

How urgent is CVE-2025-56451?

Priority 30/100. Public exploit reference

References

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