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Fencer Vulns
medium 5.8

CVE-2025-30348 json

encodeText in QDom in Qt before 6.8.0 has a complex algorithm involving XML string copy and inline replacement of parts of a string (with r…

published 2025-03-21 19 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-7261

cvss
5.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

encodeText in QDom in Qt before 6.8.0 has a complex algorithm involving XML string copy and inline replacement of parts of a string (with relocation of later data).

Patch / fix

  • Qt Qt 5.15.19, 6.5.9, 6.8.0
  • qt6-base Debian 14, Debian 13 6.8.2+dfsg-5

debian advisories DEBIAN-CVE-2025-30348

  • libqt5-qtbase SLE Module for Desktop Applications 15 SP7, SLE Module for Desktop Applications 15 SP6, SLE Module for Basesystem 15 SP7 +2 more 5.15.12+kde151-150600.3.9.1
  • qt6-base SLE Module for Package Hub 15 SP7, SLE Module for Package Hub 15 SP6, SLE Module for Desktop Applications 15 SP7 +2 more 6.6.3-150600.3.6.1

suse advisories SUSE-SU-2025:3723-1SUSE-SU-2025:03599-1

  • qt5-qtbase CBL-Mariner 2.0 5.12.11-16
  • qtbase Azure Linux 3.0 6.6.3-3

azure linux advisories AZL-58948AZL-58958

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
19 mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

  • Qt Qt

Classification

Weakness
  • CWE-407 Inefficient Algorithmic Complexity

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.