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VulnerabilityPublished Updated

CVE-2024-31156: F5 BIG-IP · Cross-site Scripting

Affects F5 BIG-IPSource CVE Database V5

0

Not known to be exploited · CVSS 8.0 High.

Data as of 26 Oct 2026, 15:59 UTC

CVSS 3.1 base score
8.0High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 May 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
F5 BIG-IPAffected
  • =17.1.0
  • =16.1.0
  • =15.1.0
Fixed in–

AI-suggested

  1. Immediately restrict access to the BIG-IP Configuration utility management interface to trusted IP addresses and networks using firewall rules or access control lists (ACLs).
  2. Enforce multi-factor authentication (MFA) for all administrative users to reduce the risk of credential compromise.
  3. Educate administrators to avoid clicking on suspicious links or opening untrusted content while logged into the BIG-IP management interface.
  4. Monitor BIG-IP logs and network traffic for unusual activity indicative of attempted XSS exploitation or unauthorized access.
  5. Apply vendor patches or updates as soon as they become available; coordinate with F5 support for timelines and interim workarounds.
  6. Consider deploying web application firewalls (WAF) or reverse proxies that can detect and block XSS payloads targeting the management interface.
  7. Regularly audit user privileges and remove unnecessary administrative accounts to minimize the number of potential targets.
  8. Implement network segmentation to isolate management interfaces from general user networks, reducing exposure.
  9. Use Content Security Policy (CSP) headers if configurable on the management interface to mitigate XSS impact.
  10. Stay informed through F5 advisories and security bulletins for updates on this vulnerability.

Description

A stored cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility that allows 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.

References

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