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Fencer Vulns
medium 6.1

CVE-2018-1000671 json

sympa version 6.2.16 and later contains a CWE-601: URL Redirection to Untrusted Site ('Open Redirect') vulnerability in The "referer" param…

published 2018-09-06 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-2000

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known, plus a Nuclei check

Summary

sympa version 6.2.16 and later contains a CWE-601: URL Redirection to Untrusted Site ('Open Redirect') vulnerability in The "referer" parameter of the wwsympa.fcgi login action. that can result in Open redirection and reflected XSS via data URIs. This attack appear to be exploitable via Victim's browser must follow a URL supplied by the attacker. This vulnerability appears to have been fixed in none available.

Patch / fix

  • sympa Debian 14, Debian 13, Debian 12 6.2.36~dfsg-1

debian advisories DEBIAN-CVE-2018-1000671

  • sympa Ubuntu Pro 14.04 LTS 6.1.17~dfsg-1ubuntu0.1~esm1
  • sympa Ubuntu Pro 16.04 LTS 6.1.24~dfsg-1ubuntu0.1~esm1
  • sympa Ubuntu Pro 18.04 LTS 6.2.24~dfsg-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2018-1000671

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

3.44% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Sympa version =>6.2.16 - Cross-Site Scripting nuclei detection template

CVSS scores

assigned by version score vector
NVD 3.0 6.1 CVSS:3.0/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.