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Vulnerability · Published Oct 11, 2026 · Assigned by VulDB

CVE-2026-108566InstantSoft icms2 Private Message index.tpl.php index cross site scripting

Low 3.5

In plain English

A low-severity cross-site scripting in icms2 from InstantSoft. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)3.5Low
Exploit odds (30 days)0.2%top 84.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in InstantSoft icms2 up to 2.18.2. This issue affects the function index of the file templates/default/controllers/messages/index.tpl.php of the component Private Message Handler. Such manipulation of the argument nickname leads to cross site scripting. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 3a1ec8fcb073a46d06a2ab83bc2bf68225834281. It is best practice to apply a patch to resolve this issue.

Affected products (as reported)

VendorProductVersions
InstantSoft icms2 2.18.02.18.12.18.2

Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

References