CVE-2004-1381

Firefox < 1.0 and Mozilla < 1.7.5 - Input Focus Spoofing via Background Tab

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2004-1381. PoCs published by Jakob Balle.

AI-analyzed exploit summary This is a proof-of-concept for a cross-site scripting (XSS) vulnerability that captures keystrokes from a user interacting with the CitiBank website. The exploit uses an onMouseOver event to continuously focus on a hidden form field, logging keystrokes entered on the target site.

Description

Firefox before 1.0 and Mozilla before 1.7.5 allow inactive (background) tabs to focus on input being entered in the active tab, as originally reported using form fields, which allows remote attackers to steal sensitive data that is intended for other sites, which could facilitate phishing attacks.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Jakob Balle · htmlremotewindows
https://www.exploit-db.com/exploits/589

This is a proof-of-concept for a cross-site scripting (XSS) vulnerability that captures keystrokes from a user interacting with the CitiBank website. The exploit uses an onMouseOver event to continuously focus on a hidden form field, logging keystrokes entered on the target site.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Web browsers (2004 era, likely affecting multiple versions)
No auth needed
Prerequisites: User interaction (hovering over the link) · Victim must have JavaScript enabled
MITRE ATT&CK
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (6)

Core 6
Core References
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100053
Patch, Vendor Advisory x_refsource_confirm
http://www.mozilla.org/security/announce/mfsa2005-05.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/17789
Exploit, Patch, Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/12712

Scores

EPSS 0.0688
EPSS Percentile 93.2%

Details

Status published
Products (18)
mozilla/firefox 0.8
mozilla/firefox 0.9 (2 CPE variants)
mozilla/firefox 0.9.1
mozilla/firefox 0.9.2
mozilla/firefox 0.9.3
mozilla/firefox 0.10
mozilla/firefox 0.10.1
mozilla/mozilla
mozilla/mozilla 1.3
mozilla/mozilla 1.4 (2 CPE variants)
... and 8 more
Published Oct 20, 2004
Tracked Since Feb 18, 2026