CVE•Published 2025-02-04•Modified 2026-04-13•1 article on news•5 live references•NVD data
CVE-2025-1020Mozilla · Firefox
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
Memory safety bugs present in Firefox 134 and Thunderbird 134. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
Timeline
Published 2025-02-04
Modified 2026-04-13
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-1020Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Mozilla Firefox"All exposed Mozilla Firefox instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Firefox"HTTP body or banner mentions "Firefox" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-1020Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-1020Censys host search filtered to this CVE id.
grep.app
CVE-2025-1020Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-1020GitHub code search for direct mentions.
Google dork
"CVE-2025-1020" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (8)
CVE-2025-10208 repos
orangetw/My-CTF-Web-ChallengesPHP
Collection of CTF Web challenges I made
superiorlu/AITreasureBoxRuby
🤖 Automatically collected AI repos, tools, websites, papers & tutorials. 实用AI百宝箱 💎
Ostorlab/KEVunknown
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
cclank/Hermes-Wikiunknown
Hermes agent + LLM Wiki + 源代码 完成 Hermes agent wiki
hoilc/scoop-lemonPowerShell
🍋Yet Another Personal Bucket for Scoop
radgeek/feedwordpressPHP
FeedWordPress: simple and flexible Atom/RSS syndication for WordPress
TLWebdesign/Joomla-3-EOL-Security-FixesPHP
Security Fixes for Joomla 3 as an installable package.
k0yt/Awesome-InfoSec-TG-channelsPython
For the most part, these are RUS tg channels and assembled manually in channels.txt. The list of subscribers is updated every 12 hours.