CVE-2021-26698Public exploitNetwork attack vector

Script execution via URL-controlled download handling

Published Jul 22, 2021 · Updated Aug 3, 2024

Cross-site scripting in OX App Suite 7.10.4 and earlier allows remote attackers to execute script code through a crafted sharing link. The backend lets the dl URL parameter alter sanitization and output handling for downloaded user-generated content, causing a shared code snippet to be served as active content. The attacker must upload the snippet and induce a user to follow or embed the modified link; execution occurs in the user’s session and can enable session hijacking or unwanted web-interface actions.

CVSS severity5.3
Medium
EPSS probability1.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in OX App Suite 7.10.4 and earlier allows remote attackers to execute script code through a crafted sharing link. The backend lets the dl URL parameter alter sanitization and output handling for downloaded user-generated content, causing a shared code snippet to be served as active content. The attacker must upload the snippet and induce a user to follow or embed the modified link; execution occurs in the user’s session and can enable session hijacking or unwanted web-interface actions.

The record

CVE
CVE-2021-26698
Published
Jul 22, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-80, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 22, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5OX Software GmbHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
4.3OX Software GmbHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
5.3OX Software GmbHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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-80Cross-Site Scripting
T1189Drive-by Compromise

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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