CVE-2025-3687: A vulnerability, which was classified as problematic, has been found in misstt123 oasys 1.0

Routine

MEDIUM 4.3DOWNGRADE

CVE-2025-3687 is a medium-severity flaw (CVSS 4.3) affecting oasys. 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 misstt123 oasys 1.0. Affected by this issue is some unknown functionality of the component Sticky Notes Handler. The manipulation leads to cross-site request forgery. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. This product is using a rolling release to provide continious delivery. Therefore, no version details for affect

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-352, CWE-862
Published	2025-04-16
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: misstt123

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

Am I affected?

Timeline

2025-04-16 12:15 UTCPublished CVE record published
2026-06-17 09:20 UTCUpdated Record last modified

misstt123 oasys DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison oasys sudo apt install oasys=<VERSION_BEFORE_1.0> sudo apt-mark hold oasys

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

dnf --showduplicates list oasys sudo dnf downgrade oasys-<VERSION_BEFORE_1.0> sudo dnf versionlock add oasys

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-2025-3687?

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

Is CVE-2025-3687 being exploited?

CVE-2025-3687 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-2025-3687 affect?

CVE-2025-3687 affects oasys. Severity is medium (CVSS 4.3). A vulnerability, which was classified as problematic, has been found in misstt123 oasys 1.0. Affected by this issue is some unknown functionality of the component Sticky Notes Handler. The manipulation leads to cross-site request forgery. T

How urgent is CVE-2025-3687?

Priority 25/100. Public exploit reference

Related CVEs

CVE-2025-3686 MEDIUM 4.3 DOWNGRADE A vulnerability classified as problematic was found in misstt123 oasys 1.0
CVE-2024-48270 HIGH 7.5 DOWNGRADE An issue in the component /logins of oasys v1.1 allows attackers to access sensitive information via a burst a

References

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