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VulnerabilityPublished

CVE-2026-88798: Really Simple Security (WordPress plugin) · Uncontrolled Resource Consumption

Affects Really Simple Security (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 9.8.3 when convenient.

Data as of 2 Nov 2026, 22:58 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 9.8.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  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

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.

What to do

Upgrade Really Simple Security (WordPress plugin) to 9.8.3.

Affected software

ProductAffectedFixed in
Really Simple SecurityAffected
  • >=8.1.6 <9.8.3
Fixed in
  • 9.8.3

AI-suggested

Upgrade the Really Simple Security plugin to version 9.8.3 or later, where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is confirmed by the version range affected and the fixed version 9.8.3.

Description

The Really Simple Security WordPress plugin before 9.8.3 does not validate a client-supplied address value before using it as a storage key in one of its own options, allowing unauthenticated attackers to grow that option without bound and to slow the site's handling of missing pages.

References

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