How severe is CVE-2018-18655?

CVE-2018-18655 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2018-18655 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18655?

CVE-2018-18655 affects Prayer Project Prayer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18655?

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

When was CVE-2018-18655 published?

CVE-2018-18655 was published on 2018-10-26 and last updated on 2026-06-17.

CVE-2018-18655

CVE-2018-18655 is a medium-severity vulnerability in Prayer Project Prayer with a CVSS 3.x base score of 4.3. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Prayer Project Prayer
Published: 2018-10-26
Last modified: 2026-06-17

Description

Prayer through 1.3.5 sends a Referer header, containing a user's username, when a user clicks on a link in their email because header.t lacks a no-referrer setting.

Frequently asked questions

What is CVE-2018-18655?: Prayer through 1.3.5 sends a Referer header, containing a user's username, when a user clicks on a link in their email because header.t lacks a no-referrer setting.
How severe is CVE-2018-18655?: CVE-2018-18655 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2018-18655 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18655?: CVE-2018-18655 affects Prayer Project Prayer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18655?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18655 published?: CVE-2018-18655 was published on 2018-10-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:prayer_project:prayer:*:*:*:*:*:*:*:*

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