CVE-2025-1932Public exploitNetwork attack vector

Memory disclosure and crash via inconsistent XSLT comparator

Published Mar 4, 2025 · Updated Jun 4, 2026

Out-of-bounds read in Mozilla Firefox and Thunderbird 122 through 135 allows remote attackers to read memory through crafted XSLT. The xslt/txNodeSorter fails to propagate an XSLT expression error, leaving the sorting algorithm with an inconsistent comparator that indexes outside the sorted array. Exploitation requires a user to process attacker-controlled content and can disclose memory or crash the application.

CVSS severity8.1
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Mozilla Firefox and Thunderbird 122 through 135 allows remote attackers to read memory through crafted XSLT. The xslt/txNodeSorter fails to propagate an XSLT expression error, leaving the sorting algorithm with an inconsistent comparator that indexes outside the sorted array. Exploitation requires a user to process attacker-controlled content and can disclose memory or crash the application.

The record

CVE
CVE-2025-1932
Published
Mar 4, 2025
Updated
Jun 4, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1UbuntuCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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