CVE-2023-3977 | Inisev Plugins (Various Versions) - Cross-Site Request Forgery on handle_installation function

Exp

Several plugins for WordPress by Inisev are vulnerable to Cross-Site Request Forgery to unauthorized installation of plugins due to a missing nonce check on the handle_installation function that is called via the inisev_installation AJAX aciton in various versions. This makes it possible for unauthenticated attackers to install plugins from the limited list via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Published: 2023-07-28 Last update: 2026-04-08 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-3977 is rated Exploit Available (57.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.66%). 18 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-3977

EDB-ID Source Kind Published Link
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Exploit prediction scoring system (EPSS) score for CVE-2023-3977

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-24 0.56% 0.66% +0.10%
2 2026-04-22 0.45% 0.56% +0.11%
3 2025-11-21 — 0.45% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-3977

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]

Weakness enumeration for CVE-2023-3977

Affected software / configurations for CVE-2023-3977

Vendor Product Version Raw CPE
backupbliss backup_migration < 1.2.8 cpe:2.3:a:backupbliss:backup_migration:*:*:*:*:*:wordpress:*:*
backupbliss clone < 2.3.8 cpe:2.3:a:backupbliss:clone:*:*:*:*:*:wordpress:*:*
copy-delete-posts duplicate_post < 1.4.0 cpe:2.3:a:copy-delete-posts:duplicate_post:*:*:*:*:*:wordpress:*:*
inisev enhanced_text_widget < 1.5.8 cpe:2.3:a:inisev:enhanced_text_widget:*:*:*:*:*:wordpress:*:*
inisev redirection < 1.1.4 cpe:2.3:a:inisev:redirection:*:*:*:*:*:wordpress:*:*
inisev rss_redirect_\&_feedburner_alternative < 3.8 cpe:2.3:a:inisev:rss_redirect_\&_feedburner_alternative:*:*:*:*:*:wordpress:*:*
inisev ssl_mixed_content_fix < 3.2.4 cpe:2.3:a:inisev:ssl_mixed_content_fix:*:*:*:*:*:wordpress:*:*
inisev ultimate_posts_widget < 2.2.5 cpe:2.3:a:inisev:ultimate_posts_widget:*:*:*:*:*:wordpress:*:*
mypopups pop-up < 1.2.0 cpe:2.3:a:mypopups:pop-up:*:*:*:*:*:wordpress:*:*
ultimatelysocial social_media_share_buttons_\&_social_sharing_icons < 3.5.8 cpe:2.3:a:ultimatelysocial:social_media_share_buttons_\&_social_sharing_icons:*:*:*:*:*:wordpress:*:*

References for CVE-2023-3977

URL Tags
https://plugins.trac.wordpress.org/browser/backup-backup/tags/1.2.7/includes/banner/misc.php#L427 Exploit
https://plugins.trac.wordpress.org/browser/backup-backup/tags/1.2.8/includes/banner/misc.php#L434 Exploit
https://plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.3.8/banner/misc.php#L426 Exploit
https://plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.4.0/banner/misc.php#L434 Exploit
https://plugins.trac.wordpress.org/browser/enhanced-text-widget/tags/1.5.6/banner/misc.php#L339 Exploit
https://plugins.trac.wordpress.org/browser/enhanced-text-widget/tags/1.5.7/banner/misc.php#L351 Exploit
https://plugins.trac.wordpress.org/browser/feedburner-alternative-and-rss-redirect/tags/3.7/modules/banner/misc.php#L427 Exploit
https://plugins.trac.wordpress.org/browser/http-https-remover/tags/3.2.3/banner/misc.php#L427 Exploit
https://plugins.trac.wordpress.org/browser/pop-up-pop-up/tags/1.1.9/modules/banner/misc.php#L427 Exploit
https://plugins.trac.wordpress.org/browser/pop-up-pop-up/tags/1.2.0/modules/banner/misc.php#L432 Exploit
https://plugins.trac.wordpress.org/browser/redirect-redirection/tags/1.1.3/includes/banner/misc.php#L427 Exploit
https://plugins.trac.wordpress.org/browser/ultimate-posts-widget/tags/2.2.4/banner/misc.php#L343 Exploit
https://plugins.trac.wordpress.org/browser/ultimate-posts-widget/tags/2.2.5/banner/misc.php#L351 Exploit
https://plugins.trac.wordpress.org/browser/ultimate-social-media-icons/tags/2.8.0/banner/misc.php#L424 Exploit
https://plugins.trac.wordpress.org/browser/ultimate-social-media-icons/tags/2.8.2/banner/misc.php#L434 Exploit
https://plugins.trac.wordpress.org/browser/ultimate-social-media-plus/tags/3.5.7/banner/misc.php#L424 Exploit
https://plugins.trac.wordpress.org/browser/wp-clone-by-wp-academy/tags/2.3.7/modules/banner/misc.php#L438 Exploit
https://plugins.trac.wordpress.org/browser/wp-clone-by-wp-academy/tags/2.3.8/modules/banner/misc.php#L432 Exploit
https://plugins.trac.wordpress.org/changeset/2944041/ultimate-social-media-plus/tags/3.5.8/banner/misc.php?old=2823720&old_path=ultimate-social-media-plus%2Ftags%2F3.5.7%2Fbanner%2Fmisc.php Patch
https://plugins.trac.wordpress.org/changeset?old_path=%2Fcopy-delete-posts%2Ftags%2F1.3.8&old=2923021&new_path=%2Fcopy-delete-posts%2Ftags%2F1.3.9&new=2923021&sfp_email=&sfph_mail= Patch
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2823769%40http-https-remover%2Ftags%2F3.2.3&new=2944114%40http-https-remover%2Ftags%2F3.2.4 Patch
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2823770%40feedburner-alternative-and-rss-redirect%2Ftags%2F3.7&new=2944116%40feedburner-alternative-and-rss-redirect%2Ftags%2F3.8#file115 Patch
https://www.wordfence.com/threat-intel/vulnerabilities/id/ab7c8926-c762-49b1-bc97-4b7a2f4f97fc?source=cve Third Party Advisory
cvelogic Threat Intelligence