CVE-2026-31350 Feehi CMS has an authenticated stored cross-site scripting (XSS) vulnerability via the Page Sign parameter

What is CVE-2026-31350?

CVE-2026-31350 is a medium-severity cross-site scripting vulnerability in n/a, published on 6 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

An authenticated stored cross-site scripting (XSS) vulnerability in Feehi CMS v2.1.1 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Page Sign parameter.

Weakness: CWE-79

Which versions are affected by CVE-2026-31350?

2 open source packages ship an affected version, including feehi/cms. It affects 1 product.

Products include Feehi Feehi Cms.

How do I fix CVE-2026-31350?

No fix has been published for CVE-2026-31350 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-31350 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31350 exists.

Other vulnerabilities in n/a

• CVE-2021-30108 Server-Side Request Forgery in Feehi CMS Critical 9.1
• CVE-2022-34971 Feehi CMS arbitrary code execution via crafted PHP file High 8.8
• CVE-2020-22643 Feehi CMS arbitrary file upload vulnerability High 7.2
• CVE-2022-38796 Feehi CMS host header injection vulnerability Medium 6.1
• CVE-2020-21146 Feehi CMS vulnerable to Cross-site Scripting in Username Field Medium 6.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-cgxr-v74v-g9mm.