What is CVE-2019-8331?

CVE-2019-8331 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-02-20.

How severe is CVE-2019-8331?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2019-8331 known to be exploited?

28 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in F5 Big-Ip Access Policy Manager

CVE-2019-8331

In Bootstrap before 3.4.1 and 4.3.x before 4.3.1, XSS is possible in the tooltip or popover data-template attribute.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-02-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.164 (96.9th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.164 · newest: 0.164 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

www.securityfocus.com/bid/107375 (VDB Entry, Third Party Advisory, vdb-entry)
seclists.org/bugtraq/2019/May/18 (mailing-list, Mailing List, Third Party Advisory)
seclists.org/fulldisclosure/2019/May/11 (mailing-list, Mailing List, Third Party Advisory)
seclists.org/fulldisclosure/2019/May/10 (mailing-list, Mailing List, Third Party Advisory)
seclists.org/fulldisclosure/2019/May/13 (mailing-list, Mailing List, Third Party Advisory)
access.redhat.com/errata/RHSA-2019:1456 (vendor-advisory, Third Party Advisory)
lists.apache.org/thread.html/54df3aeb4239b64b50b356f0ca6f986e3c4ca5b84c515dce07… (mailing-list)
lists.apache.org/thread.html/10f0f3aefd51444d1198c65f44ffdf2d78ca3359423dbc1c16… (mailing-list)
lists.apache.org/thread.html/17ff53f7999e74fbe3cc0ceb4e1c3b00b180b7c5afec8e9788… (mailing-list)
lists.apache.org/thread.html/52bafac05ad174000ea465fe275fd3cc7bd5c25535a7631c0b… (mailing-list)

Frequently asked questions

What is CVE-2019-8331?: CVE-2019-8331 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-02-20.
How severe is CVE-2019-8331?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2019-8331 known to be exploited?: 28 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.