Joomla Extension - getk2.org - Unauthenticated folder delete in K2 extension for Joomla < 2.26

published 2026-06-25 4mo ago modified 2026-10-25 17d ago also EUVD-2026-39443

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits: 0; none known

The K2 frontend `item.checkin` task accepts an unauthenticated `sigProFolder` query parameter and uses it directly to address a `JFolder::delete()` call under `/media/k2/galleries/`

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CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 4mo ago (2026-06-25)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

getk2.org K2 extension for Joomla

Classification

Weakness

CWE-862 Missing Authorization

References

getk2.org /
product

Sources

CVE List CVE-2026-48941
NVD CVE-2026-48941

Fencer Intel 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.