CVE-2021-26699Public exploitNetwork attack vector

SSRF via SVG external entity processing

Published Jul 22, 2021 · Updated Aug 3, 2024

SSRF in OX App Suite before 7.10.3-rev4 and 7.10.4 before 7.10.4-rev4 allows remote authenticated users to trigger server requests. The imageconverter follows external entity references in SVG content even when a .png suffix disguises the file type. Exploitation requires a compromised image to enter a user's workflow and be opened, enabling file-access tracking or resource exhaustion.

CVSS severity5.4
Medium
EPSS probability2.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in OX App Suite before 7.10.3-rev4 and 7.10.4 before 7.10.4-rev4 allows remote authenticated users to trigger server requests. The imageconverter follows external entity references in SVG content even when a .png suffix disguises the file type. Exploitation requires a compromised image to enter a user's workflow and be opened, enabling file-access tracking or resource exhaustion.

The record

CVE
CVE-2021-26699
Published
Jul 22, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1204.002
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4Open-XchangeCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1204.002Malicious File

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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