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CVE-2025-9796VulnerabilityPublished

CVE-2025-9796: thinkgem JeeSite · Cross Site Scripting

Affects thinkgem JeeSiteSource CVE Database V5

0

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

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
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:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Sep 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
thinkgem JeeSiteAffected
  • =5.12.0
  • =5.12.1
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

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