8.8High
CVE-2025-12821
The NewsBlogger theme for WordPress is vulnerable to Cross-Site Request Forgery in versions 0.2.5.6 to 0.2.5.9. This is due to missing or incorrect nonce validation on the newsblogger_install_and_activate_plugin() function. This makes it possible for unauthenticated attackers to upload arbitrary files and achieve remote code execution via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. This is due to a reverted fix of CVE-2025-1305.
What this means for your business
- An attacker can use it remotely, over a network, without a login, but only after tricking someone into an action such as opening a file or a link.
- FIRST's prediction model gives it a 0.3% chance of attack attempts being seen in the next 30 days, ranking above 21% of all known flaws.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 8.8 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness
- CWE-352
- Assigned by
- security@wordfence.com
Dates
- Published
- 2026-02-19
- Last modified
- 2026-09-14
- Sources
- NVD
References
- https://themes.trac.wordpress.org/browser/newsblogger/0.2.5.8/functions.php#L499
- https://themes.trac.wordpress.org/changeset?old=302341&old_path=%2Fnewsblogger%2F0.2.5.9%2Ffunctions.php&new=304663&new_path=%2Fnewsblogger%2F0.2.6%2Ffunctions.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9f33096a-dfd5-48c1-84d8-30a0faa2a7f5?source=cve