CVE-2022-1802

If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

Published: 2022-12-22 Last update: 2025-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-1802 is rated High Risk (71.4/100): CVSS High severity, with high exploitation likelihood (EPSS 67.93%, 99th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.66% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-1802

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-17 66.27% 67.93% +1.66%
2 2026-02-22 63.83% 66.27% +2.44%
3 2025-11-21 — 63.83% —

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-1802

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2022-1802

OS Trackers for CVE-2022-1802

vendor priority summary link
alpine — CVE-2022-1802: 4 source package rows (firefox, firefox-esr, librewolf, thunderbird); 128 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 43, open 85. https://security.alpinelinux.org/vuln/CVE-2022-1802
debian not yet assigned CVE-2022-1802 not yet assigned priority: Debian including 3 source packages (firefox, firefox-esr, thunderbird), 11 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 11. https://security-tracker.debian.org/tracker/CVE-2022-1802
gentoo high CVE-2022-1802: 2 GLSA(s) (202208-08, 202208-14), 4 atom(s) (mail-client/thunderbird, mail-client/thunderbird-bin, www-client/firefox, www-client/firefox-bin); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-1802
redhat critical — https://access.redhat.com/security/cve/CVE-2022-1802
suse high CVE-2022-1802 severity important: SUSE including 41 source package names (MozillaFirefox-100.0.2-1.1, MozillaFirefox-140.2.0-160000.1.2, …), 255 product×package rows across 83 product lines (Container suse/kiosk/firefox-esr, HPE Helion OpenStack 8, … (83 product lines)): Fixed 255. https://www.suse.com/security/cve/CVE-2022-1802/
ubuntu medium CVE-2022-1802 medium priority: Ubuntu including 2 source packages (firefox, thunderbird), 18 status rows across 9 suites (bionic, focal, impish, jammy, kinetic, lunar, trusty, upstream, xenial): released 9, not-affected 4, ignored 3, DNE 2. https://ubuntu.com/security/CVE-2022-1802

Affected software / configurations for CVE-2022-1802

Vendor Product Version Raw CPE
mozilla firefox < 100.0.2 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla firefox_esr < 91.9.1 cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
mozilla thunderbird < 91.9.1 cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
mozilla firefox < 100.3.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

References for CVE-2022-1802

URL Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1770137 Issue Tracking Permissions Required Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-19/ Vendor Advisory
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