How severe is CVE-2018-11347?

CVE-2018-11347 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-11347 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11347?

CVE-2018-11347 affects Yunohost. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11347?

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-2018-11347 published?

CVE-2018-11347 was published on 2018-12-04 and last updated on 2026-06-17.

CVE-2018-11347

CVE-2018-11347 is a high-severity vulnerability in Yunohost with a CVSS 3.x base score of 8.8. 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-113.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-113
Affected product: Yunohost
Published: 2018-12-04
Last modified: 2026-06-17

Description

The YunoHost 2.7.2 through 2.7.14 web application is affected by one HTTP Response Header Injection. This flaw allows an attacker to inject, into the response from the server, one or several HTTP Header. It requires an interaction with the user to send him the malicious link. It could be used to perform other attacks such as user redirection to a malicious website, HTTP response splitting, or HTTP cache poisoning.

Frequently asked questions

What is CVE-2018-11347?: The YunoHost 2.7.2 through 2.7.14 web application is affected by one HTTP Response Header Injection. This flaw allows an attacker to inject, into the response from the server, one or several HTTP Header. It requires an interaction with the user to send him the malicious link. It could be used to perform other attacks such as user redirection to a malicious website, HTTP response splitting, or HTTP cache poisoning.
How severe is CVE-2018-11347?: CVE-2018-11347 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-11347 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11347?: CVE-2018-11347 affects Yunohost. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11347?: 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-2018-11347 published?: CVE-2018-11347 was published on 2018-12-04 and last updated on 2026-06-17.

References

https://www.bishopfox.com/news/2018/10/yunohost-2-7-2-to-2-7-14-multiple-vulnerabilities/

Affected products (1)

cpe:2.3:o:yunohost:yunohost:*:*:*:*:*:*:*:*

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