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Fencer Intel
medium 6.1

CVE-2026-36761 json

A stored cross-site scripting (XSS) vulnerability in the /msg/msgInner/save endpoint of JeeSite v5.15.1 allows attackers to execute arbitra…

published 6mo ago modified 4mo ago also EUVD-2026-26394

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

A stored cross-site scripting (XSS) vulnerability in the /msg/msgInner/save endpoint of JeeSite v5.15.1 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted input into the msgContent parameter.

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CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
6mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/thinkgem/jeesite/issues/528 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.