CVE-2023-27922Network attack vector

Reflected script execution via unescaped request URI

Published May 23, 2023 · Updated Jan 17, 2025

Reflected XSS in Newsletter before 7.6.9 allows remote attackers to inject script through a crafted request URI viewed by a logged-in user. The plugin outputs the PHP $_SERVER['REQUEST_URI'] value without sufficient sanitization or escaping, reflecting attacker-controlled markup into a page. Execution requires a logged-in WordPress user to follow a crafted link, and published evidence limits exposure to older browsers that do not encode the request URI.

CVSS severity6.1
Medium
EPSS probability1.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Newsletter before 7.6.9 allows remote attackers to inject script through a crafted request URI viewed by a logged-in user. The plugin outputs the PHP $_SERVER['REQUEST_URI'] value without sufficient sanitization or escaping, reflecting attacker-controlled markup into a page. Execution requires a logged-in WordPress user to follow a crafted link, and published evidence limits exposure to older browsers that do not encode the request URI.

The record

CVE
CVE-2023-27922
Published
May 23, 2023
Updated
Jan 17, 2025
Vendor
Stefano Lissa & The Newsletter Team
Product
Newsletter
Classifications
CWE-79, CAPEC-591, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=versions prior to 7.6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Stefano Lissa & The Newsletter Team · Newsletterversion=versions prior to 7.6.9

Published CVSS scores

6.1JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.6JPCERT/CCAV:N/AC:H/Au:N/C:N/I:P/A:N
4.7WordfenceCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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