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CVE-2023-27378· NVD / CVE Program· CNA f5

BIG-IP TMUI XSS vulnerability

Multiple reflected cross-site scripting (XSS) vulnerabilities exist in undisclosed pages of the BIG-IP Configuration utility which allow an attacker to run JavaScript in the context of the currently logged-in user.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

MediumCVSS 6.1 · v3.1—No exploit Fix available
Published
May 3, 2023
Updated
Jun 17, 2026
EPSS
0.4% · 30th percentile
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Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
6.1
CNA · f5
7.5
1.4 point gap

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

VendorProduct
f5big-ip access policy manager
f5big-ip advanced firewall manager
f5big-ip advanced web application firewall
f5big-ip analytics
f5big-ip application acceleration manager
f5big-ip application security manager
f5big-ip application visibility and reporting
f5big-ip carrier-grade nat
f5big-ip ddos hybrid defender
f5big-ip domain name system
f5big-ip edge gateway
f5big-ip fraud protection service

and 7 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • f5 big-ip access policy manager13.1.0 and later · up to 13.1.5 inclusive
  • f5 big-ip access policy manager14.1.0 and later · before 14.1.5.4
  • f5 big-ip access policy manager15.1.0 and later · before 15.1.8.2
  • f5 big-ip access policy manager16.1.0 and later · before 16.1.3.4
  • f5 big-ip access policy manager17.0.0 and later · before 17.1.0.1
  • f5 big-ip advanced firewall manager13.1.0 and later · up to 13.1.5 inclusive
  • f5 big-ip advanced firewall manager14.1.0 and later · before 14.1.5.4
  • f5 big-ip advanced firewall manager15.1.0 and later · before 15.1.8.2
  • f5 big-ip advanced firewall manager16.1.0 and later · before 16.1.3.4
  • f5 big-ip advanced firewall manager17.0.0 and later · before 17.1.0.1
  • f5 big-ip advanced web application firewall13.1.0 and later · up to 13.1.5 inclusive
  • f5 big-ip advanced web application firewall14.1.0 and later · before 14.1.5.4
  • f5 big-ip advanced web application firewall15.1.0 and later · before 15.1.8.2
  • f5 big-ip advanced web application firewall16.1.0 and later · before 16.1.3.4
  • f5 big-ip advanced web application firewall17.0.0 and later · before 17.1.0.1
  • f5 big-ip analytics13.1.0 and later · up to 13.1.5 inclusive
  • f5 big-ip analytics14.1.0 and later · before 14.1.5.4
  • f5 big-ip analytics15.1.0 and later · before 15.1.8.2
  • f5 big-ip analytics16.1.0 and later · before 16.1.3.4
  • f5 big-ip analytics17.0.0 and later · before 17.1.0.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (f5). Independent of NVD's CPE analysis and usually ahead of it.

  • F5 BIG-IP

    • 17.1.0 and later · before 17.1.0.1affected · semver
    • 17.0.0 and lateraffected · semver
    • 16.1.0 and later · before 16.1.3.4affected · semver
    • 15.1.0 and later · before 15.1.8.2affected · semver
    • 14.1.0 and later · before 14.1.5.4affected · semver
    • 13.1.0 and lateraffected · semver

Same product

f5: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-1388On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior KEV
    99Now
  • CVE-2021-22986On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3 KEV
    99Now
  • CVE-2020-5902In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, the Traffic Management User InteKEV
    99Now
  • CVE-2023-46747BIG-IP Configuration utility unauthenticated remote code execution vulnerabilityKEV
    98Now
  • CVE-2021-22991On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3,KEV
    87Now
  • CVE-2026-94127BIG-IP APM OAuth vulnerabilityKEV
    68This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
F5 BIG-IP14.1.5.4Vendor (CNA)
F5 BIG-IP15.1.8.2Vendor (CNA)
F5 BIG-IP16.1.3.4Vendor (CNA)
F5 BIG-IP17.1.0.1Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvd-primary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records