Skip to content
Fencer Vulns
medium 6.1

CVE-2020-22840 json

Open redirect vulnerability in b2evolution CMS version prior to 6.11.6 allows an attacker to perform malicious open redirects to an attacke…

published 2021-02-09 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-15597

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
13.8%
EPSS 13.8% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known, plus a Nuclei check

Summary

Open redirect vulnerability in b2evolution CMS version prior to 6.11.6 allows an attacker to perform malicious open redirects to an attacker controlled resource via redirect_to parameter in email_passthrough.php.

Patch / fix

  • b2evolution b2evolution 6.11.6

Exploit prediction

13.82% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template b2evolution CMS <6.11.6 - Open Redirect nuclei detection template
  • packetstormsecurity.com http://packetstormsecurity.com/files/161362/b2evolution-CMS-6.11.6-Open-Redirection.html referenced PoC, tagged "exploit" by a source, unverified
  • exploit-db.com https://www.exploit-db.com/exploits/49554 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 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-601 URL Redirection to Untrusted Site

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.