How severe is CVE-2018-6562?

CVE-2018-6562 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-6562 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6562?

CVE-2018-6562 affects Totemo Totemomail Encryption Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6562?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-6562 published?

CVE-2018-6562 was published on 2018-05-18 and last updated on 2026-06-17.

CVE-2018-6562

CVE-2018-6562 is a high-severity vulnerability in Totemo Totemomail Encryption Gateway with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-345.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Totemo Totemomail Encryption Gateway
Published: 2018-05-18
Last modified: 2026-06-17

Description

totemomail Encryption Gateway before 6.0_b567 allows remote attackers to obtain sensitive information about user sessions and encryption key material via a JSONP hijacking attack.

Frequently asked questions

What is CVE-2018-6562?: totemomail Encryption Gateway before 6.0_b567 allows remote attackers to obtain sensitive information about user sessions and encryption key material via a JSONP hijacking attack.
How severe is CVE-2018-6562?: CVE-2018-6562 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-6562 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6562?: CVE-2018-6562 affects Totemo Totemomail Encryption Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6562?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-6562 published?: CVE-2018-6562 was published on 2018-05-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:totemo:totemomail_encryption_gateway:*:*:*:*:*:*:*:*

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