CVE-2025-6453: A vulnerability classified as critical has been found in diyhi bbs 6.8

Routine

MEDIUM 6.3DOWNGRADE

CVE-2025-6453 is a medium-severity flaw (CVSS 6.3) affecting bbs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability classified as critical has been found in diyhi bbs 6.8. Affected is the function Add of the file /src/main/java/cms/web/action/template/ForumManageAction.java of the component API. The manipulation of the argument dirName leads to path traversal. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-06-22
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: diyhi

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

Am I affected?

Timeline

2025-06-22 03:15 UTCPublished CVE record published
2026-06-17 10:01 UTCUpdated Record last modified

diyhi bbs DOWNGRADE

Affected: 6.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.8

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.8 (Debian / Ubuntu)

apt-cache madison bbs sudo apt install bbs=<VERSION_BEFORE_6.8> sudo apt-mark hold bbs

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

dnf --showduplicates list bbs sudo dnf downgrade bbs-<VERSION_BEFORE_6.8> sudo dnf versionlock add bbs

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-2025-6453?

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

Is CVE-2025-6453 being exploited?

CVE-2025-6453 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-2025-6453 affect?

CVE-2025-6453 affects bbs. Severity is medium (CVSS 6.3). A vulnerability classified as critical has been found in diyhi bbs 6.8. Affected is the function Add of the file /src/main/java/cms/web/action/template/ForumManageAction.java of the component API. The manipulation of the argument dirName le

How urgent is CVE-2025-6453?

Priority 37/100. Public exploit reference

Software pages

Java vulnerabilities

Related CVEs

CVE-2025-9461 MEDIUM 4.3 UPGRADE A weakness has been identified in diyhi bbs up to 6.8
CVE-2025-6762 MEDIUM 6.3 UPGRADE A vulnerability classified as critical has been found in diyhi bbs up to 6.8

References

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