CVE-2021-24494Network attack vector

Stored XSS via unescaped Activity email fields

Published Jul 6, 2021 · Updated Aug 3, 2024

Stored XSS in WP Offload SES Lite before 1.4.5 allows remote attackers to run scripts when an administrator opens the Activity tab. The Activity table renders stored email IDs, subjects, and recipients without applying output escaping to attacker-controlled values. The attack requires control of a logged email field and an administrator to view the tab, exposing the administrator's browser session to script actions.

CVSS severity5.4
Medium
EPSS probability0.68%
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 WP Offload SES Lite before 1.4.5 allows remote attackers to run scripts when an administrator opens the Activity tab. The Activity table renders stored email IDs, subjects, and recipients without applying output escaping to attacker-controlled values. The attack requires control of a logged email field and an administrator to view the tab, exposing the administrator's browser session to script actions.

The record

CVE
CVE-2021-24494
Published
Jul 6, 2021
Updated
Aug 3, 2024
Vendor
Delicious Brains
Product
WP Offload SES Lite
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=1.4.5 <1.4.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Delicious Brains · WP Offload SES Liteversion=1.4.5 <1.4.5

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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