How severe is CVE-2015-8398?

CVE-2015-8398 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-2015-8398 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8398?

CVE-2015-8398 affects Atlassian Confluence. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-8398?

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

When was CVE-2015-8398 published?

CVE-2015-8398 was published on 2016-04-11 and last updated on 2026-06-17.

CVE-2015-8398

CVE-2015-8398 is a medium-severity vulnerability in Atlassian Confluence 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: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Atlassian Confluence
Published: 2016-04-11
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in Atlassian Confluence before 5.8.17 allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to rest/prototype/1/session/check.

Frequently asked questions

What is CVE-2015-8398?: Cross-site scripting (XSS) vulnerability in Atlassian Confluence before 5.8.17 allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to rest/prototype/1/session/check.
How severe is CVE-2015-8398?: CVE-2015-8398 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-2015-8398 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8398?: CVE-2015-8398 affects Atlassian Confluence. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-8398?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-8398 published?: CVE-2015-8398 was published on 2016-04-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:*

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