CVE-2013-5309: Cross-site scripting (XSS) vulnerability in install/forum_data/src/custom_fields.inc.t in FUDforum 3.0.4.1 and

Routine

LOW 2.6UPGRADEDOWNGRADE

CVE-2013-5309 is a low-severity flaw (CVSS 2.6) affecting fudforum, fudforum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in install/forum_data/src/custom_fields.inc.t in FUDforum 3.0.4.1 and earlier, when registering a new user, allows remote attackers to inject arbitrary web script or HTML via a custom profile field to index.php. NOTE: some of these details are obtained from third party information.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	2.6 (Low)
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-79
Published	2013-08-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: fudforum · ilia alshanetsky

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

Am I affected?

Timeline

2013-08-16 17:55 UTCPublished CVE record published
2026-06-16 23:58 UTCUpdated Record last modified

fudforum fudforum UPGRADE

Affected: <= 3.0.4.1 · 2.7.2 · 2.7.3 · 2.7.4 · 2.7.5 · 2.7.6 · 2.7.7 · 2.8.0

Fixed in: newer than 3.0.4.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.0.4.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fudforum

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fudforum

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

ilia alshanetsky fudforum DOWNGRADE

Affected: 1.2.8 · 1.9.8 · 2.0.2 · 2.1.0 · 2.1.1 · 2.1.2 · 2.1.3 · 2.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.8

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.8 (Debian / Ubuntu)

apt-cache madison fudforum sudo apt install fudforum=<VERSION_BEFORE_1.2.8> sudo apt-mark hold fudforum

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

dnf --showduplicates list fudforum sudo dnf downgrade fudforum-<VERSION_BEFORE_1.2.8> sudo dnf versionlock add fudforum

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-2013-5309?

fudforum: upgrade to newer than 3.0.4.1; fudforum: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-5309 being exploited?

CVE-2013-5309 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-2013-5309 affect?

CVE-2013-5309 affects fudforum, fudforum. Severity is low (CVSS 2.6). Cross-site scripting (XSS) vulnerability in install/forum_data/src/custom_fields.inc.t in FUDforum 3.0.4.1 and earlier, when registering a new user, allows remote attackers to inject arbitrary web script or HTML via a custom profile field t

How urgent is CVE-2013-5309?

Priority 31/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

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CVE-2022-30861 MEDIUM 4.8 DOWNGRADE FUDforum 3.1.2 is vulnerable to Stored XSS via Forum Name field in Forum Manager Feature.
CVE-2022-30860 HIGH 7.2 UPGRADE FUDforum 3.1.2 is vulnerable to Remote Code Execution through Upload File feature of File Administration Syste

References

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