CVE-2021-24973Public exploitNetwork attack vector

Administrator script execution via unescaped AJAX input

Published Jan 3, 2022 · Updated Aug 3, 2024

Stored cross-site scripting in Gemini Labs Site Reviews before 5.17.3 allows remote attackers to run script in an administrator's browser. The glsr_action AJAX handler accepts the site-reviews parameter without sanitizing or escaping it and stores attacker-controlled markup for later output. Exploitation is unauthenticated, but script execution occurs only when a logged-in administrator opens the plugin's Tools dashboard, exposing that browser session to attacker-supplied actions.

CVSS severity6.1
Medium
EPSS probability1.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Gemini Labs Site Reviews before 5.17.3 allows remote attackers to run script in an administrator's browser. The glsr_action AJAX handler accepts the site-reviews parameter without sanitizing or escaping it and stores attacker-controlled markup for later output. Exploitation is unauthenticated, but script execution occurs only when a logged-in administrator opens the plugin's Tools dashboard, exposing that browser session to attacker-supplied actions.

The record

CVE
CVE-2021-24973
Published
Jan 3, 2022
Updated
Aug 3, 2024
Vendor
Gemini Labs
Product
Site Reviews
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 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=5.17.3 <5.17.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gemini Labs · Site Reviewsversion=5.17.3 <5.17.3

Published CVSS scores

4.3NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/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 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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