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Fencer Vulns
medium 4.8

CVE-2021-27673 json

reflected XSS in tribalsystems/zenario

published 2021-04-15 5 y ago modified 2026-06-17 4 mo ago also GHSA-8hcm-jj4x-4gmr , EUVD-2021-1293

cvss
4.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
1
Exploit-DB

Summary

Cross Site Scripting (XSS) in the "admin_boxes.ajax.php" component of Tribal Systems Zenario CMS v8.8.52729 allows remote attackers to execute arbitrary code by injecting arbitrary HTML into the "cID" parameter when creating a new HTML component.

Patch / fix

  • packagist tribalsystems/zenario 8.8.53370

Timeline

  1. Published
  2. First public exploit (EDB-49988)

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-49988 Zenario CMS 8.8.52729 - 'cID' SQL injection (Authenticated) webapps, 2021-06-11
  • deadsh0t.medium.com https://deadsh0t.medium.com/blind-error-based-authenticated-sql-injection-on-zenario-8-8-52729-cms-d4705534df38 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/163083/Zenario-CMS-8.8.52729-SQL-Injection.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N
GitHub 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
packagist tribalsystems/zenario
<8.8.53370
8.8.53370

Classification

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

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.