Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2025-5269— Memory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox ESR是美国Mozilla基金会的Firefox(Web浏览器)的一个延长支持版本。 Mozilla Firefox ESR 128.11之前版本存在安全漏洞，该漏洞源于内存损坏可能导致执行任意代码。

AI Predicted 8.7 Difficulty: Hard EPSS 0.43% · P36

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-5269

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Memory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11
Source: CVE Program / CVE List V5
Vulnerability Description
Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.11 and Thunderbird 128.11.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Firefox ESR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox ESR是美国Mozilla基金会的Firefox(Web浏览器)的一个延长支持版本。 Mozilla Firefox ESR 128.11之前版本存在安全漏洞，该漏洞源于内存损坏可能导致执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mozilla Firefox 128.11 ~ * -
Mozilla Thunderbird 128.11 ~ * -

II. Public POCs for CVE-2025-5269

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-5269

请登录查看更多情报信息。

Vendor Advisories for CVE-2025-5269 (2)

Same Patch Batch · Mozilla · 2025-05-27 · 11 CVEs total

CVE-2025-5272 Memory safety bugs fixed in Firefox 139 and Thunderbird 139
CVE-2025-5270 SNI was sometimes unencrypted
CVE-2025-5271 Devtools' preview ignored CSP headers
CVE-2025-5268 Memory safety bugs fixed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderb
CVE-2025-5267 Clickjacking vulnerability could have led to leaking saved payment card details
CVE-2025-5266 Script element events leaked cross-origin resource status
CVE-2025-5264 Potential local code execution in “Copy as cURL” command
CVE-2025-5265 Potential local code execution in “Copy as cURL” command
CVE-2025-5263 Error handling for script execution was incorrectly isolated from web content
CVE-2025-5262 Mozilla Thunderbird 安全漏洞

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2025-5269

No comments yet

Leave a comment