CVE-2023-2757Network attack vector

Subscriber-level stored XSS via unguarded saveLang writes

Published May 18, 2023 · Updated Apr 8, 2026

Stored XSS in Waiting: One-click countdowns 0.6.2 and earlier allows remote authenticated users to inject scripts through saveLang. The saveLang functions lack a capability check and save insufficiently sanitized plugin data that is later rendered without adequate output escaping. Subscriber access is sufficient, and the stored script executes when a user opens an affected page.

CVSS severity7.4
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Waiting: One-click countdowns 0.6.2 and earlier allows remote authenticated users to inject scripts through saveLang. The saveLang functions lack a capability check and save insufficiently sanitized plugin data that is later rendered without adequate output escaping. Subscriber access is sufficient, and the stored script executes when a user opens an affected page.

The record

CVE
CVE-2023-2757
Published
May 18, 2023
Updated
Apr 8, 2026
Vendor
Plugin Builders
Product
Waiting: One-click countdowns
Classifications
CWE-862, CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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=0 <=0.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Plugin Builders · Waiting: One-click countdownsversion=0 <=0.6.2

Published CVSS scores

7.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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