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Vulnerabilities

Vulnerability · CVE-2025-4339

The TheGem theme for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajaxApi() function in all versions up to, and including,

Published May 13, 2025 · catalog updated Apr 8, 2026 · CodexThemes TheGem

Check if you run it

No confirmed exploitation is on record for CVE-2025-4339. EPSS is 0.43%. Act only if a listed version of CodexThemes TheGem is installed.

Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.43%
Remediation
Vendor / distro source
Affected products
vendor CodexThemes TheGem 0 ≤5.10.3

The TheGem theme for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajaxApi() function in all versions up to, and including, 5.10.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update arbitrary theme options.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor CodexThemes TheGem 0 ≤5.10.30 ≤5.10.3

How to fix CVE-2025-4339

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-4339. EPSS is 0.43%. Act only if a listed version of CodexThemes TheGem is installed.

Which versions are affected?

Compare what you have installed with CodexThemes TheGem 0 ≤5.10.3 0 ≤5.10.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 13, 2025 · EUVD

    Detected

    The TheGem theme for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajaxApi() function in all versions up to, and including, 5.10.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update arbitrary theme options.

  2. Apr 8, 2026 · EUVD

    Updated

    The TheGem theme for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajaxApi() function in all versions up to, and including, 5.10.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update arbitrary theme options.

Sources

  • CVE.orgVulnerability recordCVE-2025-4339

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-4339

    30-day exploitation probability 0.4%

    first.org
  • EUVDVulnerability recordEUVD-2025-14369

    The TheGem theme for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajaxApi() function in all versions up to, and including, 5.10.3. This makes it possible for authenticated attackers, with Subscriber-level access and above,

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.