CVE-2005-2820: Cross-site scripting (XSS) vulnerability in SqWebMail 5.0.4 allows remote attackers to inject arbitrary web sc

Routine

MEDIUM 4.3DOWNGRADE

CVE-2005-2820 is a medium-severity flaw (CVSS 4.3) affecting sqwebmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in SqWebMail 5.0.4 allows remote attackers to inject arbitrary web script or HTML via an e-mail message containing Internet Explorer "Conditional Comments" such as "[if]" and "[endif]".

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	2.2% (top 18%)
CISA exploited list	No
Published	2005-09-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: inter7

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

Am I affected?

Timeline

2005-09-07 19:07 UTCPublished CVE record published
2026-06-16 22:15 UTCUpdated Record last modified

inter7 sqwebmail DOWNGRADE

Affected: 5.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.0.4 (Debian / Ubuntu)

apt-cache madison sqwebmail sudo apt install sqwebmail=<VERSION_BEFORE_5.0.4> sudo apt-mark hold sqwebmail

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

dnf --showduplicates list sqwebmail sudo dnf downgrade sqwebmail-<VERSION_BEFORE_5.0.4> sudo dnf versionlock add sqwebmail

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-2005-2820?

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

Is CVE-2005-2820 being exploited?

CVE-2005-2820 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-2005-2820 affect?

CVE-2005-2820 affects sqwebmail. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in SqWebMail 5.0.4 allows remote attackers to inject arbitrary web script or HTML via an e-mail message containing Internet Explorer "Conditional Comments" such as "[if]" and "[endif]".

How urgent is CVE-2005-2820?

Priority 36/100. No elevated risk signals yet.

Software pages

Internet Explorer vulnerabilities

Related CVEs

CVE-2005-2769 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in SqWebMail 5.0.4 and possibly other versions allows remote attacker
CVE-2005-2724 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in SqWebMail 5.0.4 allows remote attackers to inject arbitrary web sc
CVE-2005-1308 HIGH 7.5 DOWNGRADE SqWebMail allows remote attackers to inject arbitrary web script or HTML via CRLF sequences in the redirect pa
CVE-2004-2313 MEDIUM 5.0 DOWNGRADE Inter7 SqWebMail 3.4.1 through 3.6.1 generates different error messages for incorrect passwords versus correct
CVE-2004-0591 MEDIUM 6.8 DOWNGRADE Cross-site scripting (XSS) vulnerability in the print_header_uc function for SqWebMail 4.0.4 and earlier, and

References

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