CVE-2021-24909Public exploitNetwork attack vector

Browser script execution via unescaped post parameter

Published Jan 17, 2022 · Updated Aug 3, 2024

Reflected XSS in ACF Photo Gallery Field before 1.7.5 allows remote attackers to execute script in a victim's browser via a crafted URL. The metabox edit endpoint writes the unsanitized post parameter into an HTML attribute without escaping it. A victim must open the crafted URL; the script executes in the WordPress site's origin and can read or alter data available to that browser session.

CVSS severity6.1
Medium
EPSS probability0.80%
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 ACF Photo Gallery Field before 1.7.5 allows remote attackers to execute script in a victim's browser via a crafted URL. The metabox edit endpoint writes the unsanitized post parameter into an HTML attribute without escaping it. A victim must open the crafted URL; the script executes in the WordPress site's origin and can read or alter data available to that browser session.

The record

CVE
CVE-2021-24909
Published
Jan 17, 2022
Updated
Aug 3, 2024
Vendor
Navneil Naicker
Product
ACF Photo Gallery Field
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 17, 2022CVE 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=1.7.5 <1.7.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Navneil Naicker · ACF Photo Gallery Fieldversion=1.7.5 <1.7.5

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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