Mozilla Firefox and Thunderbird

CVE-2013-1690: Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 28 Mar 2022, 3,197 days after the CVE record was published.

How likely is exploitation in the next 30 days?

69%

EPSS score, percentile 99.3 of all scored records

How severe?

8.8 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 18 Apr 2022. Apply updates per vendor instructions.

Advisories and patches (12)

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions.

CISA due date for this action: 18 April 2022.

Advisories and patches

USN-1890-1 (Vendor advisory)
RHSA-2013:0982 (Vendor advisory)
SUSE-SU-2013:1153 (Vendor advisory)
SUSE-SU-2013:1152 (Vendor advisory)
RHSA-2013:0981 (Vendor advisory)
USN-1891-1 (Vendor advisory)
openSUSE-SU-2013:1141 (Vendor advisory)
DSA-2716 (Vendor advisory)
openSUSE-SU-2013:1142 (Vendor advisory)
openSUSE-SU-2013:1140 (Vendor advisory)
DSA-2720 (Vendor advisory)
openSUSE-SU-2013:1143 (Vendor advisory)

Linked from CISA's catalog entry

https://nvd.nist.gov/vuln/detail/CVE-2013-1690

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Mozilla Firefox and Thunderbird do not properly handle onreadystatechange events in conjunction with page reloading, which allows remote attackers to cause a denial-of-service (DoS) or possibly execute malicious code via a crafted web site.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

CISA added CVE-2013-1690 to its Known Exploited Vulnerabilities (KEV) catalog on 28 Mar 2022.
CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
The due date CISA sets for the required action is 18 Apr 2022.
The CVE record was published on 26 Jun 2013, 3,197 days before it was added to KEV.
The CVE record carries a CVSS v3.1 base score of 8.8 (High), taken from CISA's enrichment of the record.
FIRST's EPSS model puts the probability of exploitation in the next 30 days at 69% (percentile 99.3), as of 28 Oct 2026.
CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properly handle onreadystatechange events in conjunction with page reloading, which allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted web site that triggers an attempt to execute data at an unmapped memory location.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

Date	Event
26 Jun 2013	CVE record published
28 Mar 2022	Added to CISA KEV
18 Apr 2022	CISA due date for the required action
22 Oct 2025	CVE record last updated

References

5 more in the CVE record.

More exploited Mozilla vulnerabilities

CVE-2010-3765: Mozilla Multiple Products Remote Code Execution Vulnerability (added 6 Oct 2025)
CVE-2024-9680: Mozilla Firefox Use-After-Free Vulnerability (added 15 Oct 2024)
CVE-2016-9079: Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability (added 22 Jun 2023)
CVE-2015-4495: Mozilla Firefox Security Feature Bypass Vulnerability (added 25 May 2022)
CVE-2019-11707: Mozilla Firefox and Thunderbird Type Confusion Vulnerability (added 23 May 2022)
CVE-2019-11708: Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability (added 23 May 2022)