How severe is CVE-2018-14951?

CVE-2018-14951 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-14951 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-14951?

CVE-2018-14951 affects Squirrelmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-14951?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-14951 published?

CVE-2018-14951 was published on 2018-08-05 and last updated on 2026-06-17.

CVE-2018-14951

CVE-2018-14951 is a medium-severity vulnerability in Squirrelmail with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Squirrelmail
Published: 2018-08-05
Last modified: 2026-06-17

Description

The mail message display page in SquirrelMail through 1.4.22 has XSS via a "<form action='data:text" attack.

Frequently asked questions

What is CVE-2018-14951?: The mail message display page in SquirrelMail through 1.4.22 has XSS via a "<form action='data:text" attack.
How severe is CVE-2018-14951?: CVE-2018-14951 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-14951 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-14951?: CVE-2018-14951 affects Squirrelmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-14951?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-14951 published?: CVE-2018-14951 was published on 2018-08-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:squirrelmail:squirrelmail:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

171.100.156.38 (ipv4-addr)