Threats / Mozilla / CVE-2013-1690
CVE-2013-1690
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Mozilla Firefox and Thunderbird vulnerability
Mozilla Firefox and Thunderbird improperly handle onreadystatechange events during page reloads, allowing remote attackers to trigger denial-of-service or code execution via malicious websites.
Verdict
Today item — known-exploited.
Remote attackers can exploit improper event handling in Firefox and Thunderbird to cause application crashes or execute arbitrary code by crafting websites that trigger unsafe state transitions during page reload operations.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
2 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-28).
Probability (EPSS)
EPSS 0.69236 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Mozilla, Firefox and Thunderbird. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-119 Memory Buffer Bounds Error — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious website that triggers onreadystatechange events during page reload cycles to destabilize the browser.
Business
Users experience browser crashes or unexpected termination of service, reducing productivity and user trust in the application.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I exploit the buffer overflow vulnerability in event handling to inject and execute arbitrary code within the browser process.
Business
Attackers gain code execution on user systems, enabling data theft, malware installation, and compromise of sensitive information stored in the browser.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05