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Fencer Vulns
high 7.5

CVE-2026-12592 json

SlimStat Analytics < 5.5.0 - Unauthenticated Stored XSS via CF-IPCountry Header

published 2026-07-20 3 mo ago modified 2026-07-20 3 mo ago also EUVD-2026-45881

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known, plus a Nuclei check

Summary

The SlimStat Analytics WordPress plugin before 5.5.0 does not escape a visitor-controlled geolocation value before outputting it in its admin analytics reports, allowing unauthenticated visitors to store a cross-site scripting payload that executes in the browser of an administrator who views the reports. Exploitation requires the SlimStat Analytics WordPress plugin before 5.5.0 to be configured to use the Cloudflare geolocation provider.

Patch / fix

  • Unknown SlimStat Analytics 5.5.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template SlimStat Analytics < 5.5.0 - Unauthenticated Stored XSS via CF-IPCountry Header nuclei detection template
  • wpscan.com https://wpscan.com/vulnerability/3658cae6-f6ae-4ecc-8d74-bb402e61f5d5/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Unknown SlimStat Analytics

Classification

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

References

Sources

Fencer Vulns 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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.