CVE-2023-23657: Auth

Q: How do I fix CVE-2023-23657?

mail subscribe list: upgrade to newer than 2.1.9. Exact commands for each OS are on this page.

Q: Is CVE-2023-23657 being exploited?

CVE-2023-23657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-23657 affect?

CVE-2023-23657 affects mail subscribe list. Severity is medium (CVSS 6.5). Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in Richard Leishman t/a Webforward Mail Subscribe List plugin <= 2.1.9 versions.

Q: How urgent is CVE-2023-23657?

Priority 30/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2023-23657 is a medium-severity flaw (CVSS 6.5) affecting mail subscribe list. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in Richard Leishman t/a Webforward Mail Subscribe List plugin <= 2.1.9 versions.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-05-16
Last modified	2026-06-17

Publisher (CNA): Patchstack · Vendor: webfwd

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-16 10:15 UTCPublished CVE record published
2026-06-17 05:37 UTCUpdated Record last modified

webfwd mail subscribe list UPGRADE

Affected: <= 2.1.9

Fixed in: newer than 2.1.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mail-subscribe-list || rpm -q mail-subscribe-list || mail-subscribe-list --version

2. UPGRADE to newer than 2.1.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mail-subscribe-list

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mail-subscribe-list

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-23657?

mail subscribe list: upgrade to newer than 2.1.9. Exact commands for each OS are on this page.

Is CVE-2023-23657 being exploited?

CVE-2023-23657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-23657 affect?

CVE-2023-23657 affects mail subscribe list. Severity is medium (CVSS 6.5). Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in Richard Leishman t/a Webforward Mail Subscribe List plugin <= 2.1.9 versions.

How urgent is CVE-2023-23657?

Priority 30/100. No elevated risk signals yet.

Related CVEs

CVE-2022-1603 MEDIUM 4.3 UPGRADE The Mail Subscribe List WordPress plugin before 2.1.4 does not have CSRF check in place when deleting subscrib
CVE-2013-10026 LOW 3.5 UPGRADE A vulnerability, which was classified as problematic, has been found in Mail Subscribe List Plugin up to 2.0.1

References

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