CVE-2007-4874: Multiple cross-site scripting (XSS) vulnerabilities in SimpNews 2.41.03 allow remote attackers to inject arbit

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MEDIUM 4.3DOWNGRADE

CVE-2007-4874 is a medium-severity flaw (CVSS 4.3) affecting simpnews. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in SimpNews 2.41.03 allow remote attackers to inject arbitrary web script or HTML via the (1) l_username parameter to admin/layout2b.php, and the (2) backurl parameter to comment.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-79
Published	2007-09-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: boesch-it

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

Am I affected?

Timeline

2007-09-26 20:17 UTCPublished CVE record published
2026-06-16 22:44 UTCUpdated Record last modified

boesch-it simpnews DOWNGRADE

Affected: 2.41.03

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.41.03

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.41.03 (Debian / Ubuntu)

apt-cache madison simpnews sudo apt install simpnews=<VERSION_BEFORE_2.41.03> sudo apt-mark hold simpnews

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

dnf --showduplicates list simpnews sudo dnf downgrade simpnews-<VERSION_BEFORE_2.41.03> sudo dnf versionlock add simpnews

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: SimpNews 2.41.3 - 'backurl' Cross-Site Scripting
Exploit-DB: SimpNews 2.41.3 - 'l_username' Cross-Site Scripting

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-2007-4874?

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

Is CVE-2007-4874 being exploited?

CVE-2007-4874 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-2007-4874 affect?

CVE-2007-4874 affects simpnews. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in SimpNews 2.41.03 allow remote attackers to inject arbitrary web script or HTML via the (1) l_username parameter to admin/layout2b.php, and the (2) backurl parameter to comment.php.

How urgent is CVE-2007-4874?

Priority 40/100. Public exploit reference

Software pages

PHP vulnerabilities

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References

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