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VulnerabilityPublished

CVE-2026-13340: The SVG Support WordPress plugin before 2.5.17 does not apply its SVG sanitisation to uploaded files using the .svgz extension, even though it

Source GCVE Database

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Authoritative record:CVE-2026-13340· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium : upgrade to 2.5.17 when convenient.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.5.17
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 3 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CISA SSVC: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by WPScan

    , 39 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. CISA SSVC assessment

    proof of concept public

    , 11 hours after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Upgrade SVG Support (WordPress plugin) to 2.5.17.

Affected software

ProductAffectedFixed in
SVG SupportAffected
  • <2.5.17
Fixed in
  • 2.5.17

AI-suggested

If you cannot patch yet, restrict SVG upload permissions to trusted users only and consider disabling SVG uploads if possible.

Description

The SVG Support WordPress plugin versions before 2.5.17 fail to sanitize uploaded files with the .svgz extension. Although these files are registered and served as SVGs, the lack of sanitization allows users with SVG upload permissions to upload script-bearing .svgz files. Such files can execute scripts in the browsers of users who view them, including administrators. This vulnerability has a CVSS score of 6.1, indicating a medium severity level.

References

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