CVE-2025-1932 [High] | Out-of-bounds Read in Firefox

An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-bounds access. Only affected version 122 and later. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-02	0.38%	0.21%	-0.17%
2	2025-12-21	0.27%	0.38%	+0.11%
3	2025-11-21	—	0.27%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-02

0.38%

0.21%

-0.17%

2025-12-21

0.27%

0.38%

+0.11%

2025-11-21

—

0.27%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.1	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	5.2	134c704f-9b21-4f2e-91b3-4a467353bcc0

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.1

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

5.2

134c704f-9b21-4f2e-91b3-4a467353bcc0

OS Trackers for CVE-2025-1932

vendor	priority	summary	link
`alpine`	—	CVE-2025-1932: 3 source package rows (firefox, firefox-esr, thunderbird); 342 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 342.	https://security.alpinelinux.org/vuln/CVE-2025-1932
`debian`	not yet assigned	CVE-2025-1932 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-2025-1932
`gentoo`	high	CVE-2025-1932: 3 GLSA(s) (202505-02, 202505-03, 202505-08), 5 atom(s) (dev-lang/spidermonkey, 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-2025-1932
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2025-1932
`suse`	high	CVE-2025-1932 severity important: SUSE including 35 source package names (MozillaFirefox-128.8.0-112.249.3, MozillaFirefox-128.8.0-150200.152.173.1, …), 137 product×package rows across 48 product lines (Container suse/kiosk/firefox-esr, Image SLES12-SP5-SAP-Azure-LI-BYOS-Production, … (48 product lines)): Fixed 137.	https://www.suse.com/security/cve/CVE-2025-1932/
`ubuntu`	medium	CVE-2025-1932 medium priority: Ubuntu including 9 source packages (firefox, mozjs102, …), 65 status rows across 8 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream): DNE 34, ignored 10, needs-triage 9, not-affected 9, released 3.	https://ubuntu.com/security/CVE-2025-1932

Affected software / configurations for CVE-2025-1932

Vendor	Product	Version	Raw CPE
mozilla	firefox	< 128.8.0	cpe:2.3:a:mozilla:firefox:::::esr:::*
mozilla	firefox	< 136.0	cpe:2.3:a:mozilla:firefox::::::::
mozilla	thunderbird	>= ], < 128.8.0	cpe:2.3:a:mozilla:thunderbird::::::::
mozilla	thunderbird	>= 129.0, < 136.0	cpe:2.3:a:mozilla:thunderbird::::::::

References for CVE-2025-1932

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1944313	Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2025-14/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-16/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-17/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-18/	Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html

URL

CVE-2025-1932 | Inconsistent comparator in XSLT sorting led to out-of-bounds access

Exploit prediction scoring system (EPSS) score for CVE-2025-1932

Common vulnerability scoring system (CVSS) metrics for CVE-2025-1932

Weakness enumeration for CVE-2025-1932

OS Trackers for CVE-2025-1932

Affected software / configurations for CVE-2025-1932

References for CVE-2025-1932