CVE-2018-1000671

MEDIUMEPSS 92th pctl

6.1

CVSS v3

Description

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.

CWE-601Open Redirect

How to fix

Remediation Available

sympaDebian

Fixed in:6.2.36~dfsg-1CVE-2018-1000671

sympaUbuntu

Fixed in:6.1.17~dfsg-1ubuntu0.1~esm1USN-4442-1

Fixed in:6.1.24~dfsg-1ubuntu0.1~esm1USN-4442-2

Fixed in:6.2.24~dfsg-1ubuntu0.1~esm1USN-4442-2

Fixed in:6.2.40~dfsg-4ubuntu0.20.04.1~esm1USN-4442-2

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

5.39%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Third-Party Advisory2

Other references2

Related Vulnerabilities

Other CWE-601 (Open Redirect) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-4123	High	7.6	97%	-	Fix
CVE-2018-11784	Medium	4.3	94%	-	Fix
CVE-2021-22881	Medium	6.1	87%	-	Fix
CVE-2022-45402	Medium	6.1	82%	-	Fix
CVE-2017-1000117	High	8.8	76%	-	Fix
CVE-2019-10098	Medium	6.1	74%	-	Fix

Common questions

How do I fix CVE-2018-1000671?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2018-1000671 being actively exploited?

Not that we know of. CVE-2018-1000671 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 5.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 92% of all scored CVEs.

How severe is CVE-2018-1000671?

CVE-2018-1000671 has a CVSS v3 base score of 6.1, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-1000671 affect?

Published advisories record a fix for sympa (Debian), sympa (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.