CVE-2008-2131: Cross-site scripting (XSS) vulnerability in mvnForum 1.1 GA allows remote authenticated users to inject arbitr

Routine

MEDIUM 4.3DOWNGRADE

CVE-2008-2131 is a medium-severity flaw (CVSS 4.3) affecting mvnforum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in mvnForum 1.1 GA allows remote authenticated users to inject arbitrary web script or HTML via the topic field, which is later displayed by user/viewthread.jsp through use of the "quick reply button."

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-79
Published	2008-05-09
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: myvietnam

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2008-05-09 18:20 UTCPublished CVE record published
2026-06-16 22:53 UTCUpdated Record last modified

myvietnam mvnforum DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison mvnforum sudo apt install mvnforum=<VERSION_BEFORE_1.1> sudo apt-mark hold mvnforum

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

dnf --showduplicates list mvnforum sudo dnf downgrade mvnforum-<VERSION_BEFORE_1.1> sudo dnf versionlock add mvnforum

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-2008-2131?

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

Is CVE-2008-2131 being exploited?

CVE-2008-2131 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-2008-2131 affect?

CVE-2008-2131 affects mvnforum. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in mvnForum 1.1 GA allows remote authenticated users to inject arbitrary web script or HTML via the topic field, which is later displayed by user/viewthread.jsp through use of the "quick reply button

How urgent is CVE-2008-2131?

Priority 32/100. No elevated risk signals yet.

Related CVEs

CVE-2008-5400 MEDIUM 6.8 UPGRADE Multiple cross-site request forgery (CSRF) vulnerabilities in mvnForum before 1.2.1 GA allow remote attackers
CVE-2008-5399 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in the listonlineusers (aka "Who's online") component in mvnForum bef

References

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