CVE-2025-11711

MEDIUMNVD 6.56.5—

6.5

There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 9.4%
KEV: Not listed

Published

October 14, 2025

Last Modified

April 13, 2026

References (8)

security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1989978
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-81/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-82/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-83/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-84/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-85/
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html

Patch Availability(22)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	xul-ext-lightning (1:140.7.1+build1-0ubuntu0.22.04.1) @ jammy	2026-05-21	ubuntu
redhat	firefox-0:140.4.0-3.el8_6	2025-11-12	redhat
redhat	firefox-0:140.4.0-3.el9_2	2025-11-12	redhat
redhat	firefox-0:140.4.0-3.el8_4	2025-11-12	redhat
redhat	firefox-0:140.4.0-3.el8_2	2025-11-12	redhat
redhat	firefox-0:140.4.0-3.el8_8	2025-11-12	redhat
redhat	firefox-0:140.4.0-3.el9_0	2025-11-12	redhat
redhat	firefox-0:140.4.0-3.el9_4	2025-11-12	redhat
redhat	thunderbird-0:140.4.0-2.el8_8	2025-11-10	redhat
redhat	thunderbird-0:140.4.0-2.el9_4	2025-11-10	redhat
redhat	thunderbird-0:140.4.0-2.el8_6	2025-11-10	redhat
redhat	thunderbird-0:140.4.0-2.el9_2	2025-11-10	redhat
redhat	thunderbird-0:140.4.0-2.el8_2	2025-11-10	redhat
redhat	thunderbird-0:140.4.0-2.el8_4	2025-11-10	redhat
redhat	thunderbird-0:140.4.0-2.el9_0	2025-11-10	redhat
redhat	firefox-0:140.4.0-4.el7_9	2025-10-30	redhat
redhat	thunderbird-0:140.4.0-2.el8_10	2025-10-22	redhat
redhat	firefox-0:140.4.0-3.el8_10	2025-10-20	redhat
redhat	thunderbird-0:140.4.0-2.el10_0	2025-10-20	redhat
redhat	thunderbird-0:140.4.0-2.el9_6	2025-10-20	redhat
redhat	firefox-0:140.4.0-3.el10_0	2025-10-15	redhat
redhat	firefox-0:140.4.0-3.el9_6	2025-10-15	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-591

All Vendor Advisories

(22)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 11:09 UTCOSV refresh
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch

Frequently asked(5)

What is CVE-2025-11711?

CVE-2025-11711 is a medium vulnerability published on October 14, 2025. There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.

When was CVE-2025-11711 disclosed?

CVE-2025-11711 was first published in the National Vulnerability Database on October 14, 2025, with the most recent update on April 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-11711 actively exploited?

CVE-2025-11711 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-11711?

CVE-2025-11711 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2025-11711?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-11711, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-11711

Explore →

Is Your Infrastructure Affected by CVE-2025-11711?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2025-11711

Published

Last Modified

References (8)

Patch Availability(22)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-11711?

Same vendor

Same CWE

CVE-2025-11711

📅 Published

🔄 Last Modified

🔗 References (8)

Patch Availability(22)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-11711?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same vendor + same CWE)