RCE in Kerwincui Fastbee
CVE-2026-7677
A vulnerability was determined in kerwincui FastBee up to 1.2.1. The impacted element is the function Add of the file springboot/fastbee-admin/src/main/java/com/fastbee/web/controller/system/SysNoticeController.java of the component System Notice Handler. This manipulation of the argument noticeContent causes cross site scripting. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Kerwincui Fastbee — versions 1.2.0, 1.2.1
Weakness classification (CWE)
References
- vuldb.com/vuln/360830 (technical-description, vdb-entry)
- vuldb.com/vuln/360830/cti (signature, permissions-required)
- vuldb.com/submit/800724 (third-party-advisory)
- fx4tqqfvdw4.feishu.cn/docx/Iu5Dd558UoS4uIxhH9YcgNsWnjc (exploit)
Frequently asked questions
- What is CVE-2026-7677?
- CVE-2026-7677 is a low-severity vulnerability in Kerwincui Fastbee, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-05-03.
- How severe is CVE-2026-7677?
- Low severity. CVSS v3 base score is 3.5 out of 10.