CVE-2008-5760: Cross-site scripting (XSS) vulnerability in error413.php in Kerio MailServer before 6.6.2 allows remote attack

Q: How do I fix CVE-2008-5760?

kerio mailserver: upgrade to newer than 6.6.1. Exact commands for each OS are on this page.

Q: Is CVE-2008-5760 being exploited?

CVE-2008-5760 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2008-5760 affect?

CVE-2008-5760 affects kerio mailserver. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in error413.php in Kerio MailServer before 6.6.2 allows remote attackers to inject arbitrary web script or HTML via the sent parameter. NOTE: some of these details are obtained from third party info

Q: How urgent is CVE-2008-5760?

Priority 32/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2008-5760 is a medium-severity flaw (CVSS 4.3) affecting kerio mailserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in error413.php in Kerio MailServer before 6.6.2 allows remote attackers to inject arbitrary web script or HTML via the sent parameter. NOTE: some of these details are obtained from third party information.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-79
Published	2008-12-30
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kerio

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

Am I affected?

Timeline

2008-12-30 19:30 UTCPublished CVE record published
2026-06-16 23:00 UTCUpdated Record last modified

kerio kerio mailserver UPGRADE

Affected: <= 6.6.1 · 5.0 · 5.1 · 5.1.1 · 5.6.3 · 5.6.4 · 5.6.5 · 5.7.0

Fixed in: newer than 6.6.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kerio-mailserver || rpm -q kerio-mailserver || kerio-mailserver --version

2. UPGRADE to newer than 6.6.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kerio-mailserver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kerio-mailserver

Note

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

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-2008-5760?

kerio mailserver: upgrade to newer than 6.6.1. Exact commands for each OS are on this page.

Is CVE-2008-5760 being exploited?

CVE-2008-5760 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-2008-5760 affect?

CVE-2008-5760 affects kerio mailserver. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in error413.php in Kerio MailServer before 6.6.2 allows remote attackers to inject arbitrary web script or HTML via the sent parameter. NOTE: some of these details are obtained from third party info

How urgent is CVE-2008-5760?

Priority 32/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2011-1506 MEDIUM 6.8 DOWNGRADE DOWNGRADE The STARTTLS implementation in Kerio Connect 7.1.4 build 2985 and MailServer 6.x does not properly restrict I/
CVE-2009-2636 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in the Integration page in the WebMail component in Kerio MailServer
CVE-2008-5769 MEDIUM 4.3 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in Kerio MailServer before 6.6.2 allow remote attackers to
CVE-2008-0860 HIGH 10.0 MITIGATE UPGRADE Unspecified vulnerability in the AVG plugin in Kerio MailServer before 6.5.0 has unspecified impact via unknow
CVE-2008-0859 MEDIUM 5.0 DOWNGRADE Unspecified vulnerability in Kerio MailServer before 6.5.0 allows remote attackers to cause a denial of servic

References

← Back to latest CVEs