CVE-2024-31156: F5 BIG-IP · Cross-site Scripting
Affects F5 BIG-IPSource CVE Database V5
Not known to be exploited · CVSS 8.0 High.
Data as of 26 Oct 2026, 15:59 UTC
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 8 May 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| F5 BIG-IP | Affected
| Fixed in– |
AI-suggested
- 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).
- Enforce multi-factor authentication (MFA) for all administrative users to reduce the risk of credential compromise.
- Educate administrators to avoid clicking on suspicious links or opening untrusted content while logged into the BIG-IP management interface.
- Monitor BIG-IP logs and network traffic for unusual activity indicative of attempted XSS exploitation or unauthorized access.
- Apply vendor patches or updates as soon as they become available; coordinate with F5 support for timelines and interim workarounds.
- Consider deploying web application firewalls (WAF) or reverse proxies that can detect and block XSS payloads targeting the management interface.
- Regularly audit user privileges and remove unnecessary administrative accounts to minimize the number of potential targets.
- Implement network segmentation to isolate management interfaces from general user networks, reducing exposure.
- Use Content Security Policy (CSP) headers if configurable on the management interface to mitigate XSS impact.
- 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.