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Fencer Vulns
high 7.3

CVE-2021-27917 json

XSS in contact tracking and page hits report

published 2024-09-18 2 y ago modified 2026-06-17 4 mo ago also GHSA-xpc5-rr39-v8v2 , EUVD-2024-2895

cvss
7.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

Prior to this patch, a stored XSS vulnerability existed in the contact tracking and page hits report.

Patch / fix

  • packagist mautic/core-lib 4.4.13, 5.1.1
  • packagist mautic/core 4.4.13, 5.1.1
  • Mautic Mautic < 4.4.13, < 5.1.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
packagist mautic/core-lib
>=1.0.0-beta4, <4.4.13
>=5.0.0-alpha, <5.1.1
4.4.13
5.1.1
packagist mautic/core
>=1.0.0-beta4, <4.4.13
>=5.0.0-alpha, <5.1.1
4.4.13
5.1.1

Affected products

  • Mautic Mautic

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.