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Fencer Vulns
medium 6.1

CVE-2021-43009 json

A Cross Site Scripting (XSS) vulnerability exists in OpServices OpMon through 9.11 via the search parameter in the request URL.

published 2022-04-08 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29963

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
1
Exploit-DB

Summary

A Cross Site Scripting (XSS) vulnerability exists in OpServices OpMon through 9.11 via the search parameter in the request URL.

Timeline

  1. First public exploit (EDB-50857)
  2. Published

Exploit prediction

2.29% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-50857 Opmon 9.11 - Cross-site Scripting remote, 2022-04-07
  • packetstormsecurity.com http://packetstormsecurity.com/files/166619/Opmon-9.11-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

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.