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Fencer Vulns
medium 5.3

CVE-2021-26711 json

A frame-injection issue in the online help in Redwood Report2Web 4.3.4.5 allows remote attackers to render an external resource inside a fr…

published 2021-02-05 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13500

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

A frame-injection issue in the online help in Redwood Report2Web 4.3.4.5 allows remote attackers to render an external resource inside a frame via the help/Online_Help/NetHelp/default.htm turl parameter.

Exploit prediction

1.90% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • vict0ni.me https://vict0ni.me/redwood-report2web-xss-and-frame-injection/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-610 Externally Controlled Reference to a Resource in Another Sphere

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.