CVE-2018-6291: WebConsole Cross-Site Scripting in Kaspersky Secure Mail Gateway version 1.1.

This month

MEDIUM 6.1DOWNGRADE

CVE-2018-6291 is a medium-severity flaw (CVSS 6.1) affecting secure mail gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WebConsole Cross-Site Scripting in Kaspersky Secure Mail Gateway version 1.1.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-02-06
Last modified	2026-06-17

Publisher (CNA): Kaspersky Labs · Vendor: kaspersky

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-02-06 15:29 UTCPublished CVE record published
2026-06-17 02:01 UTCUpdated Record last modified

kaspersky secure mail gateway 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 secure-mail-gateway || rpm -q secure-mail-gateway || secure-mail-gateway --version

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

apt-cache madison secure-mail-gateway sudo apt install secure-mail-gateway=<VERSION_BEFORE_1.1> sudo apt-mark hold secure-mail-gateway

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

dnf --showduplicates list secure-mail-gateway sudo dnf downgrade secure-mail-gateway-<VERSION_BEFORE_1.1> sudo dnf versionlock add secure-mail-gateway

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-2018-6291?

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

Is CVE-2018-6291 being exploited?

CVE-2018-6291 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-2018-6291 affect?

CVE-2018-6291 affects secure mail gateway. Severity is medium (CVSS 6.1). WebConsole Cross-Site Scripting in Kaspersky Secure Mail Gateway version 1.1.

How urgent is CVE-2018-6291?

Priority 41/100. Public exploit reference

Software pages

Kaspersky vulnerabilities

Related CVEs

CVE-2018-6290 HIGH 7.8 DOWNGRADE Local Privilege Escalation in Kaspersky Secure Mail Gateway version 1.1.
CVE-2018-6289 CRITICAL 9.8 DOWNGRADE Configuration file injection leading to Code Execution as Root in Kaspersky Secure Mail Gateway version 1.1.
CVE-2018-6288 HIGH 8.8 DOWNGRADE Cross-site Request Forgery leading to Administrative account takeover in Kaspersky Secure Mail Gateway version
CVE-2013-6037 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in index.php in Aker Secure Mail Gateway 2.5.2 and earlier allows rem

References

← Back to latest CVEs