CVE-2025-9796: thinkgem JeeSite · Cross Site Scripting
Affects thinkgem JeeSiteSource CVE Database V5
Not known to be exploited · CVSS 5.1 Medium · fixed in 5.13.0 : update thinkgem JeeSite when convenient.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.13.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:PExploitation evidence
Disclosed: evidence found.
CVE published 1 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| thinkgem JeeSite | Affected
| Fixed in– |
AI-suggested
Beyond upgrading to JeeSite version 5.13.0, European organizations should implement several practical measures: 1) Conduct an immediate inventory to identify all instances of JeeSite 5.12.x in use, including development, staging, and production environments. 2) Apply the official patch or upgrade to 5.13.0 without delay to eliminate the vulnerability. 3) Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers, mitigating the impact of potential XSS attacks. 4) Employ input validation and output encoding on all user-supplied data, especially URLs processed by decodeUrl2 or similar functions. 5) Educate users and administrators about phishing risks and suspicious links to reduce the likelihood of user interaction triggering the exploit. 6) Monitor web application logs for unusual URL patterns or script injection attempts. 7) Use web application firewalls (WAFs) configured to detect and block common XSS attack vectors targeting JeeSite applications. These layered defenses will reduce the attack surface and limit the impact of any attempted exploitation.
Description
A vulnerability was found in thinkgem JeeSite up to 5.12.1. This affects the function decodeUrl2 of the file common/src/main/java/com/jeesite/common/codec/EncodeUtils.java. The manipulation results in cross site scripting. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 5.13.0 mitigates this issue. The patch is identified as 63773c97a56bdb3649510e83b66c16db4754965b. Upgrading the affected component is recommended.
References
- vuldb.com (opens in a new tab)
- vuldb.com (opens in a new tab)
- vuldb.com (opens in a new tab)
- github.com/thinkgem/jeesite5/issues/33 (opens in a new tab)
- github.com/thinkgem/jeesite5/issues/33 (opens in a new tab)
- github.com/thinkgem/jeesite5/issues/33 (opens in a new tab)
- github.com/thinkgem/jeesite5/commit/63773c97a56bdb3649510e83b66c16db4754965b (opens in a new tab)
- github.com/thinkgem/jeesite5/releases/tag/v5.13.0.springboo3 (opens in a new tab)